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X-WR-CALNAME:UNAM Nanoteknoloji Araştırma Merkezi
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X-WR-CALDESC:Events for UNAM Nanoteknoloji Araştırma Merkezi
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TZID:Europe/Moscow
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TZOFFSETFROM:+0300
TZOFFSETTO:+0300
TZNAME:MSK
DTSTART:20220101T000000
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END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240725T110000
DTEND;TZID=Europe/Moscow:20240725T120000
DTSTAMP:20260906T150151
CREATED:20240717T134610Z
LAST-MODIFIED:20240717T134625Z
UID:8975-1721905200-1721908800@unam.bilkent.edu.tr
SUMMARY:Polymeric Membranes - in gas- and liquid-phase separation
DESCRIPTION:Volkan Filiz\nHelmholtz-Zentrum Hereon \n\n  \nPolymeric Membranes – in gas- and liquid-phase separations \nThe main research focus at the Institute of Membrane Research at the Helmholtz-Zentrum Hereon is the development of membranes for liquid and gas phase separation. Water shortages\, climate change and energy transition: separation of substances plays a vital role in these challenges. We help provide solutions to these global problems at the Institute of Membrane Research by developing innovative membranes and membrane processes. This involves a holistic\, interdisciplinary approach: it includes developing new materials\, processing these materials into membranes as well as constructing pilot plants in which these systems are made ready for implementation.. \nSpecifically\, the synthesis and characterization of tailor-made polymers for membrane applications is in the foreground\, while the use of state of the art methods for fabrication of membranes with outstanding separation performances (e.g.\, in separation of CO2 in gas streams\, or protein separation in liquid phase) is the challenge that our Institute deals with. The focus of the talk will be polymers of intrinsic microporosity. \n  \nAbout Speaker\nVolkan Filiz is currently the head of the Department “Microporous Polymers” at the Helmholtz-Zentrum Hereon in the Institute of Membrane Research under the supervision of Prof. Volker Abetz. He has earned his B.S. and M.S. degrees in chemistry at the University of Hamburg\, Germany and received in 2009 from the Institute of Physical Chemistry his Ph.D. in chemistry under the supervision of Prof. Stephan Förster. The research topic was polymersomes for drug delivery and targeting. His research interests now include the synthesis of new monomers and tailor-made polymers for membrane applications in gas- and liquid-phase separation. \nHe is currently also involved in teaching at the University of Hamburg and is registered for habilitation at the University of Kiel. \n  \n \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/polymeric-membranes-in-gas-and-liquid-phase-separation/
CATEGORIES:UNAM Thursday Seminars
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/07/volkan-filiz.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240718T140000
DTEND;TZID=Europe/Moscow:20240718T150000
DTSTAMP:20260906T150151
CREATED:20240717T083525Z
LAST-MODIFIED:20240717T083525Z
UID:8971-1721311200-1721314800@unam.bilkent.edu.tr
SUMMARY:Thermal Drawing Of Low-Dimensional Material-Integrated Triboelectric Fibers For Healthcare Applications
DESCRIPTION:Thermal Drawing Of Low-Dimensional Material-Integrated Triboelectric Fibers For Healthcare Applications \nMSc Thesis Defense \nMd Sazid Bin Sadeque\nAdvisor – Mustafa Ordu \nAbstract: The potential of flexible wearable devices and sensors to revolutionize healthcare lies in their ability to facilitate real-time monitoring. However\, many of these wearable sensors are extensive energy consumers\, and the requirement of bulky energy storage devices significantly hampers their acceptability. Currently available sensing devices mostly employ film-based devices\, which lack breathability\, reducing their applicability in widespread healthcare applications. Triboelectric nanogenerators (TENGs) are environmentally sustainable devices that convert mechanical and biomechanical energy into electrical output through the synergetic processes of triboelectrification and electrostatic induction. These devices effectively harvest low-frequency mechanical and biomechanical energy and enable self-powered sensing. TENG performance can be enhanced by incorporating low dimensional materials with high specific surface area into flexible ferroelectric polymers. Ferroelectric polyvinylidene fluoride (PVDF) and its copolymers are particularly advantageous due to their high dielectric constant and abundant highly electronegative fluorine ions. Various low dimensional materials can interact with the polar groups of PVDF and reorient them to conform to electroactive phases. Moreover\, they can also form micro-capacitors and modulate the surface properties of nanocomposite. In this thesis\, we aim to prepare a triboelectric nanogenerator integrated textile fiber with self-energy generating ability and breathability as textiles. We employed the thermal drawing process as a fabrication platform for preparing continuous triboelectric fibers. Graphene nanoplatelet (GNP) and Molybdenum disulfide (MoS2) are added to the PVDF matrix to improve triboelectric properties. β phases of thermally drawn nanocomposite fibers demonstrate significant improvement and were increases to 37.6%\, 39.5%\, and 43.3% for 1\, 3\, 5% GNP integration. For the case of MoS2\, β phase increases to 47.5% for 3 wt% MoS2; however\, β phase decreases beyond 3 wt%. The nanocomposite TENG fibers demonstrate improved triboelectric properties. The fibers show superior sensitivity\, flexibility and durability\, enabling their applications in critical healthcare applications. \nKeywords: Triboelectric nanogenerator\, thermal drawing\, wearable sensors\, respiration monitoring\, blinking monitoring.
URL:https://unam.bilkent.edu.tr/en/event/thermal-drawing-of-low-dimensional-material-integrated-triboelectric-fibers-for-healthcare-applications/
LOCATION:UNAM Conference Hall (SU-01)
CATEGORIES:MSN Thesis Defense
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/07/MSN-Thesis-Defense.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240708T083000
DTEND;TZID=Europe/Moscow:20240711T170000
DTSTAMP:20260906T150151
CREATED:20240813T065540Z
LAST-MODIFIED:20240813T065540Z
UID:8995-1720427400-1720717200@unam.bilkent.edu.tr
SUMMARY:Uniting Young Generations with Science through the 6th Genetic Engineering School Events Led by UNAM’s Dr. Urartu Şeker
DESCRIPTION:With the vision of Bilkent University National Nanotechnology Research Center (UNAM) to create high quality and novel knowledge and train qualified human resources\, Dr. Urartu Şeker provided the opportunity for high school students to delve into the realms of genetic engineering and synthetic biology at the Genetic Engineering School\, for the sixth time. \nA group of 23 students partook in a comprehensive program at UNAM from July 8-11\, 2024\, delving into the realms of genetic engineering and biotechnology. Throughout these four days\, they not only received extensive training in these subjects but also actively engaged in hands-on experiments. Throughout the program\, students gained knowledge on topics such as DNA replication\, ancient DNA research\, protein analysis\, and synthetic biology. They also had the opportunity to learn advanced laboratory techniques\, including Polymerase Chain Reaction (PCR) and SDS gel electrophoresis\, through hands-on experiments. Additionally\, they gained detailed insights into the latest developments and applications in biotechnology and developed skills in reading and interpreting scientific articles. \nProgram: \nJuly 8\, 2024 – Monday \n10:00-10:30: Introduction and Opening Remarks\n10:30-11:30: Lecture 1.1: Fundamentals of Evolution and Biotechnology Research\n11:30-12:00: Lecture 1.2: Basic Bioinformatics Methods (Introduction to Bioinformatics Databases)\n12:00-13:00: Lunch Break\n13:00-13:30: Lecture 1.3: Life Molecules DNA/RNA and Genetic Code\n13:30-14:30: Experiment 1: Amplifying and Copying DNA: Polymerase Chain Reaction\n14:30-15:00: Lecture 1.4: Benchling Overview\n15:00-16:00: Experiment 2: Visualization of PCR-Amplified DNA in Agarose Gel\, Wrap-Up \n  \nJuly 9\, 2024 – Tuesday \n10:00-10:30: Lecture 2.1: Examining Biological Records of the Past: Ancient DNA Research\n10:30-11:00: Lecture 2.2: Cell Structure and Function\n11:00-12:00: Lecture 2.3: Heredity and Genetic Information Transfer\n12:00-13:00: Lunch Break\n13:00-15:00: Experiment 3: Gene Transfer to Bacteria\n15:30-16:00: Day Review\, Wrap-Up \n  \nJuly 10\, 2024 – Wednesday \n10:00-10:30: Lecture 3.1: Life Engineering: Synthetic Biology\n10:30-11:30: Evaluation of Gene Transfer Results\n11:30-12:00: Experiment 4: Casting SDS Gel for Protein Analysis\n12:00-13:00: Lunch Break\n13:00-14:00: Experiment 5: Loading Protein Samples onto SDS Gel\n14:00-15:00: Lecture 3.2: How Proteins Fold and What They Look Like: Working with Alphafold\n15:00-16:00: Experiment 6: Visualization of Protein Samples in SDS Gel \n  \nJuly 11\, 2024 – Thursday \n10:00-10:30: How to Read a Scientific Article\n10:30-11:00: Lecture 4.1: The Central Dogma of Molecular Biology\n11:00-12:00: Experiment 7: Production of Fluorescent Proteins in a Cell-Free System\n12:00-13:00: Lunch Break\n13:00-15:00: Lecture 4.2: How Biological Knowledge is Used in Technology Development: Biotechnology\n15:00-16:00: Day Review\, Wrap-Up
URL:https://unam.bilkent.edu.tr/en/event/uniting-young-generations-with-science-through-the-6th-genetic-engineering-school-events-led-by-unams-dr-urartu-seker/
CATEGORIES:UNAM Events
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240605T083000
DTEND;TZID=Europe/Moscow:20240607T180000
DTSTAMP:20260906T150151
CREATED:20240522T111733Z
LAST-MODIFIED:20240522T111733Z
UID:8785-1717576200-1717783200@unam.bilkent.edu.tr
SUMMARY:2nd Singapore-Türkiye Workshop on Materials Science and Engineering
DESCRIPTION:2nd Singapore-Türkiye Workshop on Materials Science and Engineering\nWe are delighted to invite you to a two-day event on material science and engineering with a focus on advanced materials ranging from two-dimensional materials to quantum dots at Bilkent University\, organized by NUS\, Bilkent University UNAM\, NTU Singapore. This second event will bring together researchers and students to share their latest findings in materials science and engineering\, as well as related fields. You will have the opportunity to attend lectures\, workshops\, and poster sessions\, as well as network with peers and mentors. Don’t miss this chance to learn from one of the most influential scientists of our time and to explore the potential of advanced materials for the future. The event will have limited space. Register in advance! Visit last year’s event page from here. \nMore information:\nhttps://unam.bilkent.edu.tr/stmse24/ \n 
URL:https://unam.bilkent.edu.tr/en/event/2nd-singapore-turkiye-workshop-on-materials-science-and-engineering/
CATEGORIES:UNAM Workshop
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240524T150000
DTEND;TZID=Europe/Moscow:20240524T163000
DTSTAMP:20260906T150151
CREATED:20240521T071830Z
LAST-MODIFIED:20240521T071830Z
UID:8776-1716562800-1716568200@unam.bilkent.edu.tr
SUMMARY:Repurposing Biomaterials and Its Applications
DESCRIPTION:Hojae Bae\nKonkuk University\, Seoul\, Korea \n\nRepurposing Biomaterials and Its Applications \nIn recent years\, numerous studies have been conducted on cultured meat; however\, the production of large-sized cultured meat continues to present a challenge. In this regard\, 3D bioprinting emerges as a promising approach for generating large cell aggregates to facilitate cultured meat production. Utilizing digital light processing-based (DLP) printing\, a hydrogel scaffold is created at the centimeter scale\, offering high printing accuracy and the ability to construct complex geometric structures. Successful fabrication of scaffolds incorporating living cells and large microchannels has been achieved. Notably\, the cooked cultured meat retains its original size and shape even after being cut\, with overall dimensions measuring 3.43 cm x 5.53 cm x 0.96 cm. This study demonstrates the proof-of-concept for utilizing bioinks in the production of 3D cultured meat. Nevertheless\, due to substantial disparities between the objectives of muscle tissue engineering for biomedical purposes and food applications\, conventional strategies may prove unfeasible or socially unacceptable. Consequently\, the pursuit of non-animal materials to foster muscle cell proliferation and alignment\, without resorting to potentially toxic chemical modifications\, represents an ongoing challenge. To address this\, recent studies focusing on culturing and aligning muscle cells solely through plant-based materials will be presented as a potential solution for cultured meat production. \n  \n \nFigure 1. Schematic illustration showcasing the (A) efficient transdifferentiation of bovine fibroblasts into myogenic and adipogenic lineages within a 3D bioprinting system\, facilitating the production of steak-like cultured meat. Additionally\, we explore the (B) development of a cultured meat production system for large-scale manufacturing employing the wet-spinning technique. \n\nJeong\, J. W. Seo\, H. Lee\, W. K. Jung\, Y. H. Park\, and H. Bae\, Advanced Science\, 2022\, 9(31)\, 2202877\nJeong\, G. Jang\, W. K. Jung\, Y. H. Park\, and Hojae Bae*\, Stretchable zein-coated alginate fiber for aligning muscle cells to artificially produce cultivated meat\, npj science of food\, 8(13) doi.org/10.1038/s41538-024-00257-y .\n\n  \n  \n  \nAbout Speaker\nProf. Bae is a Professor at Konkuk University in Seoul\, Korea\, specializing in engineered biomaterial technologies for translational applications. \n  \nHe holds a Bachelor’s degree in Genetic Engineering and a Master’s degree in Bioengineering from Korea University\, as well as a Ph.D. in Food Technology from Clemson University. His doctoral dissertation on Gelatin-nanoclay composite material has been published in several major scientific journals holds an International Patent (World Intellectual Property Organization). He has presented results from his studies related to Ph.D. training at major national conferences. \nWith expertise in natural polymers\, Prof. Bae focuses on developing controlled micro- and nano-architectures for engineered tissue\, aiming to guide tissue morphogenesis and cell behavior in tissue engineering applications. He has also pioneered various high-performance biomaterials for medical applications\, currently undergoing translational studies. Prof. Bae’s extensive knowledge of biopolymer-based hydrogels has led him to explore interdisciplinary applications and modifications of these materials. He is committed to translating his research findings into commercially viable products. For instance\, his recent work on centimeter-scale 3D printed hydrogel constructs for tissue engineering has demonstrated the potential for producing steak-type cultured meat. \nProf. Bae has edited multiple books/journal special issues and is an author of over 100 peer-reviewed journal articles\, editorials\, and review papers\, as well as more than 20 book chapters/edited books and >10 patent/disclosure applications. His work has been published in leading journals and routinely highlighted in international media. He has been cited approximately 16\,000 times and has an H-index of 60. \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/repurposing-biomaterials-and-its-applications/
CATEGORIES:UNAM Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240516T080000
DTEND;TZID=Europe/Moscow:20240516T170000
DTSTAMP:20260906T150151
CREATED:20240527T103013Z
LAST-MODIFIED:20240527T103823Z
UID:8803-1715846400-1715878800@unam.bilkent.edu.tr
SUMMARY:Basic sciences: The mission of homo sapiens in the universe
DESCRIPTION:Sergey V. Gaponenko\nNational Academy of Sciences of Belarus \n\nBasic sciences: The mission of homo sapiens in the universe \nIn spite of high recognition of basic sciences by academic community there is still a need to identify the decisive role of basic sciences in many facets of human life including not only its role in education but also as the root of high technologies\, as the cheapest stage of innovations\, as the efficient way of people diplomacy. The arguments in favor of these statements are given in the present paper.\nBasic sciences do form the basis for innovations and can be viewed as the first\, preliminary stage of the general innovation chain. However\, the major societal and economical impact of significant discoveries and breakthrough theories cannot be foreseen or predicted in advance. In general the statement is valid that high technologies are born by high science. \nBasic sciences represent the most cheap\, low-cost stage of innovations. Though certain megaprojects can be thought by common customers and tax payers as money wasteful activity for the sake of education development and scientists’ curiosity only\, a brief analysis of spending for research and development shows that basic sciences need much less money than applied research and developments. For example\, the cost of joint efforts of EU countries in Large Hadron Collider megaproject is approximately equivalent to annual R&D spending of Intel corporation. \nBasic sciences unite intellectual community and represent a bright manifestation of science diplomacy bridging people of different races\, religions and cultures. This becomes possible and is promoted owing to fruitfulness of international efforts in basic research and because of non-commercial\, non-classified character of results in basic sciences.\nMoreover\, we suggest to consider the continuous development of scientific worldview (which only basic sciences enable) to be treated as the mission of homo sapiens in the universe. We ought to conceive the structure of the universe from the sub-atomic level to astronomical scale. This responsibility can be viewed as a part of cosmoethics\, i. e.\, internal intrinsic responsibility of humans for their presence in the universe. \n  \nAbout speaker\nSergey Gaponenko is Director of the B. I. Stepanov Institute of Physics of The National Academy of Sciences of Belarus. He is an expert in nanophotonics and plasmonics with about 200 published papers and 3 books published by Camridge University\, the recent one in 2019 being a joint work with Prof. H. M. Demir. In his early studies he made a contribution to photophysics of colloidal semiconductor nanocrystals (quantum dots) whereas nowadays he focuses at plasmonically enhanced luminescence and Raman spectroscopies as well as systematic studies of photon density of states effects in complex media from nanoscience to astrophysics. \n  \n \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/basic-sciences-the-mission-of-homo-sapiens-in-the-universe/
CATEGORIES:UNAM Thursday Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240515T083000
DTEND;TZID=Europe/Moscow:20240515T183000
DTSTAMP:20260906T150151
CREATED:20240527T103635Z
LAST-MODIFIED:20250508T122727Z
UID:8806-1715761800-1715797800@unam.bilkent.edu.tr
SUMMARY:NanoDay 2024
DESCRIPTION:Bilkent University UNAM has proudly hosted an annual NanoDay event where prominent figures from the global scientific community converge. Researchers\, students\, and industry representatives from Turkey and beyond come together for this extraordinary occasion. We are thrilled to announce that this year’s NanoDay will take place on Wednesday\, May 15\, 2024. \nSince 2014\, UNAM has been organizing NanoDay\, hosting prominent international figures in the field of science. This year\, once again\, UNAM is preparing to welcome leading names in science. \nAs part of NanoDay 2024\, we will have the honor of hosting Prof. Monika Ritsch-Marte from the Innsbruck Medical University in Austria\, who is renowned for her expertise in biomedical imaging. We will also welcome Prof. Pepijn Pinkse from the University of Twente in the Netherlands to share his recent research on quantum optics in complex systems. Additionally\, Prof. Sergey Gaponenko from the Belarusian Academy of Sciences for his significant contributions to the fields of nanophotonics and semiconductor nanocrystals. \nSince its inception\, UNAM has brought together more than 3\,000 individuals through NanoDay in pursuit of scientific inquiry. This remarkable event not only fosters a vibrant atmosphere of discovery but also empowers students from Bilkent University and other esteemed institutions to showcase their talents. Through engaging activities like the NanoArt competition and the NanoPoster competition and exhibition\, young innovators find a platform to express their creativity and passions\, transforming the event into a celebration of knowledge and expression. \nJoin us and be a part of this exhilarating event! \nNanoDay Web Site
URL:https://unam.bilkent.edu.tr/en/event/nanoday-2024/
CATEGORIES:UNAM Nanoday
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240508T110000
DTEND;TZID=Europe/Moscow:20240508T123000
DTSTAMP:20260906T150151
CREATED:20240430T133416Z
LAST-MODIFIED:20240430T133437Z
UID:8723-1715166000-1715171400@unam.bilkent.edu.tr
SUMMARY:Coherent perfect absorption and transmission of light
DESCRIPTION:Stefan Rotter\nTU Wien – Vienna University of Technology \n\nCoherent perfect absorption and transmission of light \nIn my talk I will present two recent works focused on the perfect absorption and transmission of waves through interferometric cancellation of backscattering. In the first case [1]\, we demonstrate that even a weakly absorbing film can be turned into a “coherent perfect absorber” by building a degenerate cavity around it. This special cavity perfectly couples incoming light fields with arbitrary wavefronts into the absorber – even for the case that light is a dynamically varying speckle pattern. In the second case [2]\, we demonstrate how to construct an anti-reflection structure for a complex scattering system like a disordered medium. Similar to an anti-reflection coating for conventional eye-glasses\, this structure leads to perfect transmission across the scattering system by suppressing back-scattering for any incoming wavefront. If time permits\, I will also say a few words about the topological origin of the above effects and how this aspect can be used to engineer thermal radiation [3]. \n[1] Y. Slobodkin\, G. Weinberg\, H. Hörner\, K. Pichler\, S. Rotter\, and O. Katz\, Science 377\, 995 (2022)\n[2] M. Horodynski\, M. Kühmayer\, C. Ferise\, S. Rotter\, and M. Davy\, Nature 607\, 281 (2022)\n[3] M. S. Ergoktas\, A. Kecebas\, K. Despotelis\, S. Soleymani\, G. Bakan\, A. Kocabas\, A. Principi\, S. Rotter\, S. K. Özdemir\, and C. Kocabas\, arXiv:2401.08316 \n  \n \n  \nAbout speaker\nStefan Rotter is professor at TU Wien’s Institute for Theoretical Physics. After studies in Vienna and Lausanne\, he obtained his Ph.D. in 2004\, followed by a postdoctoral position at Yale University. His group was established in 2011 and focuses on non-Hermitian physics\, theoretical quantum optics and on the propagation of classical or quantum waves through complex media. In all of these fields the Rotter group aims at identifying interesting new research directions and at exploring them in close collaboration with the experiment. \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/coherent-perfect-absorption-and-transmission-of-light/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240417T133000
DTEND;TZID=Europe/Moscow:20240417T143000
DTSTAMP:20260906T150151
CREATED:20240415T104850Z
LAST-MODIFIED:20240415T131258Z
UID:8681-1713360600-1713364200@unam.bilkent.edu.tr
SUMMARY:The Sound of Music at the Nanoscale – Exploring the Nanoscale World with NEMS Resonators Based on Low Dimensional Nanomaterials
DESCRIPTION:Zenghui Wang\nUniversity of Electronic Science and Technology of China \n\nThe Sound of Music at the Nanoscale – Exploring the Nanoscale World with NEMS Resonators Based on Low Dimensional Nanomaterials \nThe advent of low-dimensional nanostructures has enabled a plethora of new devices and systems. Among them\, nanoelectromechanical systems (NEMS) offers the unique capability of coupling the exquisite material properties found in these atomically-defined nanostructures with their mechanical degree of freedom\, opening new opportunities for exploring exotic phenomena at the nanoscale. In particular\, as these devices driven into mechanical vibration—just as musical instruments—they become essentially nanoscale guitars\, drums\, tuning folks\, etc. By studying the infinitesimal mechanical vibrations in these nanoscale “music instruments”\, i.e.\, listening to the “sound of music” at the nanoscale\, researchers can study a number of fundamental physical processes such as absorption\, phase transition\, anisotropy\, and nonlinear processes. \n \nAbout speaker\nZenghui Wang is currently a professor in the Institute of Frontier and Fundamental Sciences (IFFS) at the University of Electronic Science and Technology of China (UESTC). His research interests and expertise primarily focus on nanoscale devices and systems\, particularly Nanoscale Resonators\, and High-Frequency Resonant Sensors & Transducers. Prior to joining Case\, during 2010-2012\, he worked at Cornell University as a postdoc researcher. He earned a Ph.D. degree (2010) from University of Washington\, Seattle\, for building an ultra-high frequency NEMS resonant sensor with an individual single-walled carbon nanotube\, and using it to detect and study the low-dimensional phase transitions of the atomic layer adsorbed on the nanotube surface. He is an expert on studies of emerging nanoscale devices and sensors based on new materials such as carbon nanotubes\, graphene\, and other low-dimensional nanomaterials\, and has published 20+ research articles in peer-reviewed journals\, including Science\, Nature Physics\, Nature Nanotechnology\, Nature Communications\, Science Advances\, Nano Letters\, ACS Nano\, Physical Review Letters\, 2D Materials\, etc.\,. He has given dozens of invited talks and seminars at peer-reviewed conferences and research universities. He is an Associate Editor for Micro and Nano Letters\, and has been serving on the Technical Program Committees for IEEE IFCS\, IEEE Nano\, and the MEMS/NEMS Technical Group at the American Vacuum Society (AVS) International Symposium and Exhibition. \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/the-sound-of-music-at-the-nanoscale-exploring-the-nanoscale-world-with-nems-resonators-based-on-low-dimensional-nanomaterials/
CATEGORIES:UNAM Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240417T110000
DTEND;TZID=Europe/Moscow:20240417T143000
DTSTAMP:20260906T150151
CREATED:20240415T075937Z
LAST-MODIFIED:20240415T080032Z
UID:8675-1713351600-1713364200@unam.bilkent.edu.tr
SUMMARY:The path to no-drift sensors with on-chip stress calibration
DESCRIPTION:Erdinç Tatar\nBilkent University – Electrical and Electronics Engineering\, UNAM \n\nThe path to no-drift sensors with on-chip stress calibration \nNavigation is vital for the future of autonomous mobility.  Data from multiple sensing modalities (GPS\, camera\, radar\, …) are fused in navigation.  Among these sensors\, inertial navigation is error-proof and can fit into every car and smartphone if a low-cost\, no-drift sensor is invented.  Drift is a major problem for inertial sensors\, limiting their utilization in navigation applications.  Inertial sensor data\, i.e.\, acceleration and rotation\, is integrated to find the position\, and drift leads to unacceptable position error over time.  The common drift suppression approach is temperature calibration\, but various works have shown that it cannot eliminate the drift.  The drift mechanisms are complex and cannot be fully characterized by simple temperature measurements.  So\, I propose an on-chip stress calibration approach that directly correlates with the drift. We integrate multiple stress sensors and the inertial sensor on the same chip and achieve state of the art drift performance with on-chip stress sensing.  Functional calibration requires deep understanding of the device and temperature effects.  I will present our drift solution approach\, which includes sensor and electronics design\, analytical modeling\, and combining temperature and stress measurements. \n \nAbout speaker\nErdinc Tatar is an Assistant Professor in the Department of Electrical and Electronics Engineering at Bilkent University.  He is also affiliated with National Nanotechnology Center of Turkey (UNAM).  He received B.S. and M.S. degrees (with high honors) in Electrical and Electronics Engineering from Middle East Technical University (METU)\, Ankara\, Turkey\, and Ph.D. degree in Electrical and Computer engineering from Carnegie Mellon University\, Pittsburgh\, PA\, in 2008\, 2010\, and 2016 respectively. \nHe was a Graduate Research Assistant with Micro-Electro-Mechanical Systems Research and Applications Center\, METU\, and with Carnegie Mellon University from 2008 to 2011\, and 2012 to 2016\, respectively.  From 2016 to 2019 he worked as a MEMS Design Engineer responsible for the development of next generation gyroscopes in Analog Devices\, Inc.\, Wilmington\, MA.  His research interests include MEMS sensors (specifically Inertial and Gas sensors)\, microfabrication and packaging technologies\, and readout and control electronics for MEMS sensors. \nDr. Tatar is a recipient of International Fellowship for Outstanding Researchers by TUBITAK\, Marie Skłodowska-Curie Actions (MSCA) Fellowship and European Research Council (ERC) Starting Grant by the European Union. \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/the-path-to-no-drift-sensors-with-on-chip-stress-calibration/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240306T110000
DTEND;TZID=Europe/Moscow:20240306T123000
DTSTAMP:20260906T150151
CREATED:20240228T132209Z
LAST-MODIFIED:20240228T132301Z
UID:8593-1709722800-1709728200@unam.bilkent.edu.tr
SUMMARY:Multiscale Simulation Approaches to Understanding the Control of Trafficking in Cells
DESCRIPTION:Philip Biggin\nBiochemistry – University of Oxford \n\nMultiscale Simulation Approaches to Understanding\nthe Control of Trafficking in Cells \nTrafficking receptors control protein localisation through the recognition of specific signal sequences that specify unique cellular locations. Differences in luminal or organellular pH are important for the vectorial trafficking of cargo receptors. The KDEL receptor is responsible for maintaining the integrity of the ER by retrieving luminally localised folding chaperones in a pH-dependent mechanism. Structural studies have revealed the end states of KDEL receptor activation and the mechanism of selective cargo binding. However\, precisely how the KDEL receptor responds to changes in luminal pH remains unclear. To address this key question of cell biology\, we have used a combination of X-ray crystallography\, cell-based assays and multi-scale simulation methods. In this talk I will discuss how we have used a variety of computational techniques including QM\, GCMC\, MD and coarse-grained MD to explain how this cellular trafficking works at the molecular level. \n \nKonuşmacı hakkında\nPhilip Biggin is Professor of Computational Biochemistry in the Department of Biochemistry at the University of Oxford. He studied Computer-aided Chemistry at the University of Surrey for his undergraduate degree before completing a DPhil (PhD) in molecular biophysics at the University of Oxford. He then obtained a Wellcome Trust International Prize Fellowship that allowed him to undertake post-doctoral work at the Salk Institute\, California. He returned to Oxford in 2000 for further post-doctoral work\, before being awarded a prestigious RCUK Fellowship (with tenure track) in 2007. In 2012 this post reverted automatically to an Associate Professor (tenured). In 2016 he was made Full Professor at the University of Oxford. \nHis interests are focussed on the development and application of computational methods with particular respect to membrane proteins and membrane-drug interactions. He has over 150 peer-reviewed publications in this field\, and has previously acted as a consultant to BioMedCentral. He served as Chair of the Molecular Graphics and Modelling Society for over 10 years and is a Fellow of the Royal Society of Chemistry (FRSC) as well as a chartered chemist (CChem). He is a member of the British Biophysical Society and the US Biophysical Society. He was a founder member of CCPBioSim and HECBioSim committees that aim to promote the application of high-performance computing to biological problems. He also chaired allocation panels on PRACE – the European supercomputing facility. He has also served on the REF panel\, which is responsible for assessing the quality of UK science every seven years. His group has an excellent record in developing new approaches\, from assessing conformational states via normal mode analysis\, to a novel way to compare X-ray crystallographic data with molecular dynamics simulations and a way to align protein structures purely on the basis of their dynamics. \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/multiscale-simulation-approaches-to-understanding-the-control-of-trafficking-in-cells/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240228T110000
DTEND;TZID=Europe/Moscow:20240228T123000
DTSTAMP:20260906T150151
CREATED:20240226T064237Z
LAST-MODIFIED:20240226T064237Z
UID:8581-1709118000-1709123400@unam.bilkent.edu.tr
SUMMARY:Security printing with laser-induced plasmonic colors
DESCRIPTION:Nathalie Destouches\nUniversity Jean Monnet\, Saint Etienne \n\nSecurity printing with laser-induced plasmonic colors \nPlasmonic colors have garnered significant attention in recent years due to their anticipated profound impact on various industrial sectors. These colors\, stemming from the resonant interaction between light and metallic nanostructures\, offer stability over time and can be fabricated as thin films. The ability to control the shape and organization of metallic nanostructures further provides spectral sensitivity to light polarization\, enabling the development of innovative applications. \n  \nLaser-induced printing of a color image on a Ag:TiO2 thin film observed in reflection with polarized light for angle 1 (left)\, or 2 (middle) or in transmission under non-polarized light.  \nThis presentation explores the diverse physical and chemical mechanisms induced by lasers on plasmonic metasurfaces composed of silver nanoparticles embedded in a TiO2 thin film. Under continuous wave (cw)\, nanosecond\, or femtosecond1 laser exposure\, silver nanoparticles undergo reshaping\, shrinking\, or growth\, and self-organize along subwavelength gratings. Various laser-induced self-organized nanostructures are identified and their origins are elucidated through optical models. Once formed\, these self-organized nanostructures exhibit intriguing dichroic optical properties\, whose origin\, elucidated through electromagnetic modeling\, lies in the hybridization of resonant modes.2 These singular optical properties present opportunities for innovation\, particularly in high-end anti-counterfeiting applications. Laser-induced printed image multiplexing emerges as a recently developed inkless technique\, providing high flexibility to print multiplexed colored images observable independently under natural light by altering the viewing angle.3 \nReferences \n\nDestouches\, et al. Laser-empowered metasurfaces for white light image multiplexing Adv. Func. Mater. 2010430 (2021)\nD. Le\, et al. Understanding and exploiting the optical properties of laser-induced quasi-random plasmonic metasurfaces ACS Appl. Opt. Mater.\, accepted (2024)\nDalloz\, et al. Anti-counterfeiting white light printed image multiplexing by fast nanosecond laser processing Adv. Mater.\, 34\, 2104054 (2022)\n\nKonuşmacı hakkında\nNathalie Destouches is Professor at University Jean Monnet\, Saint-Etienne\, France. She leads projects at the interface between materials science and photonics and she is particularly interested in the interaction of light with plasmonic metasurfaces. She coordinates the Erasmus Mundus Joint Master Degree Photonics for Security Reliability Sustainability and Safety. Her main scientific contributions have led to the development of plasmonic photochromic materials\, to the elucidation of different laser-triggered mechanisms in plasmonic films\, to the explanation of the electromagnetic response of random plasmonic metasurfaces\, to the simulation of metallic nanoparticle growth under dynamic laser irradiation\, or to the explanation of special thermal behavior in dynamic laser processes. These fundamental studies led to the development of laser printing of color and multiplexed images in collaboration with a leading security document company. \n  \n \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/security-printing-with-laser-induced-plasmonic-colors/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240131T110000
DTEND;TZID=Europe/Moscow:20240131T120000
DTSTAMP:20260906T150151
CREATED:20240117T134603Z
LAST-MODIFIED:20240117T134603Z
UID:8447-1706698800-1706702400@unam.bilkent.edu.tr
SUMMARY:SESAME and Research Opportunities
DESCRIPTION:Mustafa Fatih Genişel\nSESAME \n\nSESAME and Research Opportunities \nSynchrotron-Light for Experimental Science and Applications in the Middle East (SESAME) is a “third-generation” synchrotron light source that was officially opened in Allan (Jordan) on 16 May 2017. It is the first synchrotron light source in the Middle East and neighbouring countries\, and also the region’s first major international centre of excellence.\nThe heart of SESAME is a 2.5 GeV synchrotron light source (133m in circumference)\, providing radiation from the Infrared light to X-rays of unparalleled quality\, a unique tool to expand the boundaries of scientific investigations into new materials and living matter.\nThere are five operational beamline and one under construction. The beamlines are the following: \n1.BM02 – IR (Infrared) spectromicroscopy beamline\n2.BM08 – XAFS/XRF (X-ray Absorption Fine Structure/X-ray Fluorescence) spectroscopy beamline\n3.ID09 – MS/XPD (Materials Science/X-ray Powder Diffraction) beamline\n4.ID10 – BEATS (BEAmline for Tomography at SESAME)\n5.ID11L – HESEB (HElmholtz-SEsame Beamline)\n6.ID11R – TXPES (Turkish soft X-ray PhotoElectron Spectroscopy) beamline – this beamline is being constructed by a Turkish consortium led by TENMAK (Turkish Energy\, Nuclear and Mineral Research Agency);\nIt is now possible to apply for proposals to the five operational beamlines of SESAME\, the deadline is on February 29th 2024\, at 23:59 Jordanian time for the user period starting from September 1st to December 31st\, 2024. \n \nPicture of SESAME storage ring; Bending Magnet (RED)\, Beam shifter of BEATS beamline (VIOLET) and HESEB undulator (BLUE) \nKonuşmacı hakkında\nDr. Mustafa Fatih Genişel is the HESEB beamline scientist at SESAME. Mustafa Genisel received his BS and PhD degrees in Chemistry from Middle East Technical University and Bilkent University\, respectively. He was a faculty member at Dicle University before joining SESAME. His research studies focus on PVD hard coatings and characterization. \n  \n \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/sesame-and-research-opportunities/
CATEGORIES:UNAM Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231218T110000
DTEND;TZID=Europe/Moscow:20231218T123000
DTSTAMP:20260906T150151
CREATED:20231213T115653Z
LAST-MODIFIED:20231213T115653Z
UID:8110-1702897200-1702902600@unam.bilkent.edu.tr
SUMMARY:Molecular technologies in wine production
DESCRIPTION:Irina Mitina\nTechnical University of Moldova \n\nMolecular technologies in wine production \nViticulture and winemaking in Moldova have a history of many centuries and are an inseparable part of life and culture of Moldovan people. The country is located between latitude 46-47˚\, similar to other renowned wine regions in Europe\, and has a climate favorable for the production of quality wine. In spite of the country’s small size (the area is ~33.8 km²)\, Moldova is among the top 20 largest wine producers and ranks 13th in terms of wine exports in the world. Essentially\, wine production is a microbiological process where yeasts and bacteria play the key role. For example\, Saccharomyces yeast convert grape sugars to ethanol during alcoholic fermentation\, while lactic acid bacteria convert malic acid into lactic acid during malolactic fermentation. However\, there are a lot of yeast and bacteria associated with grapes and wines\, and not all of them are beneficial. Some species\, even though capable of alcoholic or malolactic fermentations\, produce various secondary metabolites with undesirable sensory qualities\, thus behaving as ‘wine spoilers’. Early detection of such wine spoilers would allow winemakers to take quick decisions related to wine treatment. Traditionally\, the methods of detection of wine spoilers included plating and colony count. Recently\, DNA-based methods of detection and quantification of wine spoilage microorganisms have been developed. Some issues related to detection and quantification of the most common wine spoilers will be discussed in this talk. \nKonuşmacı hakkında\nI am a molecular biology scientist currently working at the Technical University of Moldova on wine microbiology\, in the national project “Improving of food quality and safety through biotechnology and food engineering”\, bilateral research and innovation project TÜBİTAK- NARD (Türkiye — Moldova) “Detecting Minute Spoilage in Wine through a Handheld Device in the Field” and State University of Moldova on soil and plant associated microorganisms\, in the national project “Long-term ex situ conservation of plant genetic resources in the Gene Bank using the methods of molecular biology for plant germplasm health testing”. I completed my PhD in genetics in the Academy of Sciences of Moldova (2002) and had postdoctoral appointments at several universities\, including University of California at Berkeley (USA)\, Seoul National University (South Korea)\, Universidad Andres Bello (Santiago\, Chile). My research interests lie in the field of microbiome research\, in particular how the microbiome composition can affect the quality of the final product. \n  \n \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/molecular-technologies-in-wine-production/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231116T153000
DTEND;TZID=Europe/Moscow:20231116T170000
DTSTAMP:20260906T150151
CREATED:20231108T075500Z
LAST-MODIFIED:20231108T075500Z
UID:8049-1700148600-1700154000@unam.bilkent.edu.tr
SUMMARY:Quantum Material Integrated Optoelectronics for Disruptive Technologies
DESCRIPTION:Emre Ozan Polat\nKadir Has University \n\nQuantum Material Integrated Optoelectronics for Disruptive Technologies \nDespite the significant progress on the wafer-based optoelectronics\, providing a broad optical response with a mechanically robust and optically seamless device structure remains as an outstanding challenge. This challenge mainly hinders the realization of disruptive technologies such as hyperspectral imaging and skin-integration of wearables for clinically accurate telemedicine. In this talk\, I will briefly explain some novel nanomaterial-based approaches and the resulting devices that I have developed to provide solutions for image sensing\, optical extraction of vital signs\, and manipulation of light in broad range of wavelengths. By focusing on the physics lying behind the demonstrated novel optoelectronic devices\, I will show the results of my research that benefits from the intrinsic mechanical flexibility and charge carrier properties of low dimensional materials. To show the promises of my approaches\, I will share information on the proof-of-concept devices and provide methodological insight into the CMOS integration and wearable use of quantum materials empowering next generation optoelectronics for hyperspectral imaging and telemedicine. \n \n  \n  \nKonuşmacı hakkında\nDr. Emre Ozan Polat is an Assistant Professor at the Mechatronics Engineering Department of Kadir Has University. He works on the quantum material integrated sensor systems and optoelectronic applications of two-dimensional materials. His PhD research (İhsan Doğramacı Bilkent University\, Physics) reports the development of graphene-based optoelectronic devices that work in the visible spectrum. After PhD\, he obtained several Marie Curie and EU fellowships to join University of Glasgow\, (UK) and ICFO-The Institute of Photonic Sciences (Spain)\, where he developed humanitarian technologies using light-matter interactions. He is an author of 30+ publications\, book chapters\, patent applications and projects. He is awarded ”BAGEP 2021 Physics Award” of Bilim Akademisi\, “Innovator of The Year” of Spanish Foundation of Science and Technology (2017)\, Silver Leaf Award” of IEEE (2015)\, and “Young Scientist Award” of European Material Research Society (E-MRS) (2014). \n  \n\n 
URL:https://unam.bilkent.edu.tr/en/event/quantum-material-integrated-optoelectronics-for-disruptive-technologies/
CATEGORIES:UNAM Thursday Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231110T160000
DTEND;TZID=Europe/Moscow:20231110T170000
DTSTAMP:20260906T150151
CREATED:20231106T124821Z
LAST-MODIFIED:20231106T124821Z
UID:8036-1699632000-1699635600@unam.bilkent.edu.tr
SUMMARY:Molding the flow of waves in complex media: imaging\, trapping\, and shaping
DESCRIPTION:Arthur Goetschy\nESPCI Paris \n\nMolding the flow of waves in complex media: imaging\, trapping\, and shaping \nThe study of waves in complex systems has evolved profoundly over the last decade\, with the demonstration of rich and useful effects that cannot be explained by the traditional diffusion model of wave propagation. In photonic systems in particular\, recent developments in disorder engineering and wavefront shaping protocols have enabled spectacular demonstrations of light manipulation\, such as tunable transparency\, focusing or enhanced energy delivery in opaque materials. In this talk\, we propose to review some of our recent achievements in this field. Concrete examples will include imaging through disordered systems\, study of correlated materials with bandgap and localization properties\, optimization of dwell-time\, and transport of entangled photons in multiple-scattering systems. \n \n  \n  \nAbout Speaker\nArthur Goetschy is an Associate Professor and theoretical physicist at ESPCI Paris. His research activities focus on the control of waves in complex media\, light-matter interactions\, and quantum optics. He developed during his PhD a framework to characterize the collective excitations of non-Hermitian Hamiltonians\, with applications for random lasers\, photonic glasses\, or cold atom gases. In 2012\, he joined the group of Doug Stone at Yale University\, where he established a random matrix formalism for the open channels of scattering systems\, which has been successfully applied to enhance focusing\, energy deposition\, or absorption in wavefront-shaping experiments. Since his hiring in 2014 at Institut Langevin\, he has proposed original models to harness dwell-time\, synchronization\, information\, bandgaps\, or localization in random or strongly correlated photonic structures\, using classical or quantum entangled light. \n 
URL:https://unam.bilkent.edu.tr/en/event/molding-the-flow-of-waves-in-complex-media-imaging-trapping-and-shaping/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231108T153000
DTEND;TZID=Europe/Moscow:20231108T170000
DTSTAMP:20260906T150151
CREATED:20231031T104028Z
LAST-MODIFIED:20231031T104028Z
UID:8022-1699457400-1699462800@unam.bilkent.edu.tr
SUMMARY:Effect of surface charged groups on colloidal\, optical properties and cellular uptake of inorganic nanoparticles
DESCRIPTION:Mikhail Artemyev\nBelarusian State University \n\nEffect of surface charged groups on colloidal\, optical properties and cellular uptake of inorganic nanoparticles \nSurface charged groups play enormous role in colloidal stabilization of inorganic nanoparticles in aqueous solutions. They also govern such important characteristics\, as electrophoretic mobility\, ability to electrostatic interaction with different objects from solid surfaces to biomolecules. Here\, I present our recent results on how to introduce different types of charged groups in the surface shell of semiconductor and metal nanoparticles\, how the sign and the magnitude of the surface charge and the type of groups affect colloidal stability of nanoparticles in aqueous media. Surprisingly\, the surface charge affects not only their electrophoretic mobility\, but indirectly their hydrodynamic size measured by DLS. Both strong negative and positive surface charge is capable to quench the photoluminescence of semiconductor quantum dots and cause a spectral shift of plasmon resonances in silver nanoparticles. Moreover\, various types of cells demonstrate selective uptake of colloidal quantum dots with specific surface charge. All of that demonstrates practical perspectives for utilization of charged plasmonic and semiconductor nanoparticles as the optical nano-sensors and markers. \n  \n  \nAbout Speaker\nGraduated chemistry department of BSU in 1985. Defended Ph.D. in physical chemistry in 1991\, in 2009 defended Dr.Sci. thesis. From 1985 up to now is an employee of RIPCP\, from 2010 head of laboratory of nanochemistry. The main scientific activities lie in the synthesis of colloidal semiconductor and metal nanoparticles\, investigating their optical properties\, photochemical and electrochemical behavior\, interaction with biomolecules and cells. Published more than 200 scientific papers\, IF =45. \n 
URL:https://unam.bilkent.edu.tr/en/event/effect-of-surface-charged-groups-on-colloidal-optical-properties-and-cellular-uptake-of-inorganic-nanoparticles/
CATEGORIES:UNAM Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231020T160000
DTEND;TZID=Europe/Moscow:20231020T170000
DTSTAMP:20260906T150151
CREATED:20231018T080219Z
LAST-MODIFIED:20231018T080231Z
UID:7952-1697817600-1697821200@unam.bilkent.edu.tr
SUMMARY:Quantum Computers\, Quantum Sensors\, and Magnets
DESCRIPTION:Michael E. Flatté\nThe University of Iowa \n\nRecent advances in quantum technologies\, including room-temperature quantum operations on quantum bits (“qubits”)\, suggest the field is rapidly progressing towards practical quantum sensors and computers. However a major challenge remains how to connect these qubits together. Some types of qubits are very small\, making it very difficult to get wires in to address them individually. Some other types\, like the most advanced superconducting qubits\, are very big\, making it difficult to put very many of them into a single fridge. I will describe some general approaches to linking qubits together on the micron scale required for practical integration of many qubits\, as well as some potential advantages to using magnetic materials as “linkers”. Recent practical demonstrations of linking behavior are creating a new subfield of quantum research based on magnetic excitations\, or magnons\, entitled Quantum Coherent Magnonics. \n \n  \n  \nAbout Speaker\nMichael E. Flatté received the A.B. degree in physics from Harvard University\, Cambridge\, MA\, USA\, in 1988\, and the Ph.D. degree in physics from the University of California at Santa Barbara\, Santa Barbara\, CA\, USA\, in 1992. He is a Professor at the Department of Physics and Astronomy\, The University of Iowa (UI)\, Iowa City\, IA\, USA. After his post-doctoral work at the Institute for Theoretical Physics\, University of California at Santa Barbara\, and the Division of Applied Sciences\, Harvard University\, he joined the faculty at UI in 1995. He has over 270 publications and ten patents. He has an adjunct appointment as a Professor at the Department of Applied Physics\, Eindhoven University of Technology\, Eindhoven\, The Netherlands. His research interests include optical and electrical control of spin dynamics in materials\, novel spintronic devices\, quantum sensors\, and solid-state realizations of quantum computation. Dr. Flatté is a fellow of the American Association for the Advancement of Science and the American Physical Society. \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/quantum-computers-quantum-sensors-and-magnets/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231013T160000
DTEND;TZID=Europe/Moscow:20231013T170000
DTSTAMP:20260906T150151
CREATED:20231018T075909Z
LAST-MODIFIED:20231018T075928Z
UID:7943-1697212800-1697216400@unam.bilkent.edu.tr
SUMMARY:Micro/nano processing technology for metamaterials
DESCRIPTION:Yoshiaki Kanamori\nTohoku University \n\nMicro/nano processing technology is one of the important elements for achieving the academic progress and industrialization of metamaterials. There are strong expectations for the establishment of micro/nano fabrication technology to produce metamaterials that meet needs. Here\, the metamaterials developed in my research group and their microfabrication technologies are discussed. \n(i) Hydrogen annealing techniques\nBy promoting the self-diffusion of silicon surface atoms in a high-temperature hydrogen atmosphere\, the shape of the silicon surface can be deformed in the order of micro/nano meter. A structural color device (I) for visible light can be fabricated using this technology\, and a silicon dielectric metamaterial with a target size can be fabricated at a target location. \n(ii) Silicon direct bonding technologies\nWe have developed a technology to fabricate an anti-reflection metasurface on the slope of a silicon prism (II)\, which is difficult to fabricate with a normal semiconductor process\, and have realized high-efficiency terahertz light sources. \n(iii) Micro-electromechanical systems (MEMS)\nA MEMS-driven reconfigurable metamaterial device fabrication technology has been developed. We have developed tunable filters for optical communication and 6G communication systems (III). A part of this work was supported by JST\, CREST Grant Number JPMJCR2102\, Japan. \n \n  \n  \nAbout Speaker\n  \nDr. Yoshiaki Kanamori\, earned his Ph.D. in Engineering from the Department of Mechanical and Electronic Engineering at Tohoku University\, in 2001\, and he assumed the role of Assistant Professor at the Graduate School of Engineering. He was a visiting researcher between 2002 and 2003 at the Laboratory of Photonics and Nanostructure\, in CNRS\, France. Dr. Kanamori was appointed as an Associate Professor at the Graduate School of Engineering in 2007 and later professor in 2019. Previously\, he was the director of the Micro and Nanomachining Research and Education Center (MNC). Dr. Kanamori assumed the position of Director at the Metamaterials Research and Innovation Center (Meta-RIC) and joined Green Future Creation Organization at Tohoku University. \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/micro-nano-processing-technology-for-metamaterials/
CATEGORIES:Nanocolloquium Series
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20230415T140000
DTEND;TZID=Europe/Moscow:20230415T180000
DTSTAMP:20260906T150151
CREATED:20230413T123849Z
LAST-MODIFIED:20230413T124450Z
UID:7625-1681567200-1681581600@unam.bilkent.edu.tr
SUMMARY:The World Quantum Day Celebrated at UNAM
DESCRIPTION:In honor of the World Quantum Day\, Bilkent University’s National Nanotechnology Research Center (UNAM) will be holding an event on Saturday\, April 15 in partnership with QTurkey. \nThe World Quantum Day has been celebrated since April 14\, 2021\, with the aims of creating social awareness about quantum technologies and increasing the interest and knowledge levels of individuals who will develop and use these technologies in the future. This year\, QTurkey is organizing the event in both online and face-to-face formats in Istanbul\, Ankara\, and Izmir. Additional support will be provided by student branches from QSB ÇOMÜ\, QSB Bilkent\, QSB SU\, QSB KU\, QSB MSGSU\, QSB TOBB ETÜ\, QSB IZTECH\, QSB TGU\, QSB GTU\, QSB İTÜ\, QSB METU\, and QSB Marmara. \nSpeakers at the event will include Asst. Prof. Hasan Yılmaz and Asst. Prof. İbrahim Sarpkaya from UNAM\, Prof. Dr. Oğuz Gülseren and Asst. Prof. Cihan Okay from Bilkent University\, Asst. Prof. Osman Barış Malcıoğlu from METU\, and Assoc. Prof. Murat Kurt from Ondokuz Mayıs University. \nRegister:\nhttp://qturkey.org/14nisan-23/ \nProgram:\n14:40 Climbing the Full Universal Density Functional Ladder Using Quantum Machine Learning – Asst. Prof. Barış Malcıoğlu \n15:10 Quantum Light in Complex Systems – Asst. Prof. Hasan Yılmaz \n15:40 Quantum Arithmetic from Qubits to Qudits – Assoc. Prof. Murat Kurt \n16:40 Materials for Quantum Technologies – Prof. Dr. Oğuz Gülseren \n17:10 Quantum Light Sources in Low-Dimensional Materials – Asst. Prof. İbrahim Sarpkaya
URL:https://unam.bilkent.edu.tr/en/event/the-world-quantum-day-celebrated-at-unam/
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20230407T160000
DTEND;TZID=Europe/Moscow:20230407T170000
DTSTAMP:20260906T150151
CREATED:20230403T120948Z
LAST-MODIFIED:20230403T120948Z
UID:7562-1680883200-1680886800@unam.bilkent.edu.tr
SUMMARY:Structure Control in Biomimetic Hybrid Membranes: From Molecular Engineering to In-operando Characterisation
DESCRIPTION:Amin Sadeghpour Dilmaghani\nUniversity of Leeds \n\nThe properties and function of advanced materials in biomimetic environments are associated with their morphology\, hierarchy\, anisotropy and mechanical properties. For instance\, the structural morphology of biopolymer networks in cellular scaffolds is known to play important roles in cellular adhesion and proliferation\, controlling the tissue homeostasis. The ability to engineer nanostructured soft materials with multiscale hierarchy by sustainable approaches (e.g. free of chemical cross linking)\, yet offering appropriate porosity and mechanical stability remains a great challenge in engineering advanced functional food and biomaterials.\nIn this seminar\, I will present our recent development in fabrication of novel hybrid lipid-polymer membranes by introducing unique nanostructures from lipid self-assemblies into biopolymer networks.1\, 2 I will also discuss the state of the art in-situ X-ray scattering analytical methods that we applied to understanding of structure-function correlations in hybrid systems and their potential applications as cell substrates. \n \n1. Yuan\, Y.; Shi\, Y.; Banerjee\, J.; Sadeghpour\, A.; Azevedo\, H. S.\, Materials Today Bio 2023\, 100598.\n2. Tien\, N. D.; Maurya\, A. K.; Fortunato\, G.; Rottmar\, M.; Zboray\, R.; Erni\, R.; Dommann\, A.; Rossi\, R. M.; Neels\, A.; Sadeghpour\, A.\, Langmuir 2020\, 36 (40)\, 11787-11797. \n  \n  \nAbout Speaker\n  \nDr. Amin Sadeghpour is a Lecturer in Food Nanostructures and Processing at the School of Food Science and Nutrition\, the University of Leeds\, UK. His expertise is in the area of colloids & functional nanomaterials and the application of Small- and Wide-Angle X-ray Scattering (SAXS/WAXS) techniques. Amin received his PhD in Colloids and Surface Chemistry from the University of Geneva in Switzerland under the supervision of Prof Michal Borkovec. Prior to his current position\, Amin was appointed a leading position at the Centre for X-ray Analytics of Empa – the Swiss Federal Laboratories of Materials Science and Technology.\nAmin’s research focuses on understanding the correlations between the soft matter nanostructures and their interactions with the biological environment. He is particularly interested in the design\, processing and characterisation of biomimetic systems\, i.e.\, in lipid-polymer hybrid materials with responsive nanoscale hierarchy and controlled functions for applications in food bioprocessing and nutraceutical delivery. His research includes the development and application of in-situ X-ray analytics (SAXS/WAXS) to elucidate the structural dynamics in the advanced materials. \nZoom Conference \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/structure-control-in-biomimetic-hybrid-membranes-from-molecular-engineering-to-in-operando-characterisation/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221125T160000
DTEND;TZID=Europe/Moscow:20221125T170000
DTSTAMP:20260906T150151
CREATED:20221121T112949Z
LAST-MODIFIED:20230403T121046Z
UID:7076-1669392000-1669395600@unam.bilkent.edu.tr
SUMMARY:Novel electronic properties of quantum critical Dirac plasma
DESCRIPTION:Alexey Berdyugin\nThe National University of Singapore \n\nThe most recognizable feature of graphene’s electronic spectrum is its Dirac point around which interesting phenomena tend to cluster. At elevated temperatures thermal excitations can overcome the disorder and create an electron-hole (e-h) plasma of Dirac fermions. The Dirac plasma has recently been found to exhibit unusual properties including quantum critical conductivity and hydrodynamic flow.\nFirst\, I’ll discuss our recent work on magnetotransport properties of Dirac plasma in graphene. In low magnetic field\, the plasma exhibits giant magnetoresistivity reaching >100% in 0.1 T even at room temperature. This is orders of magnitude higher than magnetoresistivity found in any other system at such temperatures and originates from the exceptional mobility of graphene at the neutrality point. With the onset of Landau quantization in a few T\, where the e-h plasma resides on the zeroth Landau level\, giant linear magnetoresistivity emerges which is sensitive to the Columb interaction in the system.\nIn the second part of my talk\, I’ll discuss the out-of-equilibrium transport in twisted bilayer graphene and other graphene superlattices which is\, surprisingly\, closely related to the Dirac plasma. Due to small number of carriers and reduced Fermi velocity\, even moderate current bias in those systems produces a strong shift of Fermi surface. That leads to the current-critical behavior with superconducting-like IV curves. Criticalities develop when the drift velocity of electrons flow approach the Fermi velocity of the system. The observed anomaly caused by the Schwinger-like production of electron-hole plasma. The observed behavior is expected to be common for all 2D superlattices. \n  \n  \n  \nAbout Speaker\n  \nProf Alexey Berdyugin studied at the Moscow Phystech (which is the most prestigious university for natural science in Russia) from 2010 to 2016\, where he received his bachelor and master degrees in condensed matter physics. Next\, he conducted doctoral research at the University of Manchester under the supervision of Sir. Andre Geim and Prof. Irina Grigorieva. During that time\, he has been focusing on the transport properties of novel van der Waals materials. He received his PhD in Nanoscience in May 2020. After that\, he carried on his work in United Kingdom and focused on a non-linear current propagation regime in novel 2D superlattices. Recently he has received a prestigious NUS Presidential Young Professorship award and joined the MSE and Physics departments. \nUNAM Conference Hall\, \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/novel-electronic-properties-of-quantum-critical-dirac-plasma/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221014T160000
DTEND;TZID=Europe/Moscow:20221014T170000
DTSTAMP:20260906T150151
CREATED:20221010T073501Z
LAST-MODIFIED:20221010T073501Z
UID:6804-1665763200-1665766800@unam.bilkent.edu.tr
SUMMARY:Spintronics with novel two-dimensional materials
DESCRIPTION:Ahmet Avsar\nThe National University of Singapore \n\nExploitation of the intrinsic spin of an electron\, spintronics\, could facilitate the development of multifunctional and novel devices. As regards to material selection\, two-dimensional (2D) crystals and their van der Waals heterostructures could enable new spintronics functionalities that are inaccessible in conventional bulk materials [1]. To exploit the full potential of such heterostructures\, the family of 2D spin transport and magnetic materials needs to be expanded. \nIn this talk\, I will present our efforts in exploring novel materials for this emerging field. Firstly\, I will introduce ultra-thin\, semiconducting black phosphorus as a promising spin transport channel material and discuss our recent efforts focused on investigating the impact of its unique crystal structure on spin dynamics [2]. Then\, I will demonstrate inducing magnetism into an otherwise non-magnetic 2D material with the creation of some specific types of defects [3]. Finally\, I will provide an outlook about the potential of heterostructures based on such novel 2D materials for fundamental spintronics research and applications in information storage and logic devices. \n[1] A. Avsar et al.\, Rev. Mod. Phys. 92\, 021003 (2020).\n[2] A. Avsar et al.\, Nat. Phys. 13\, 888-894 (2017) & L. Cording et al.\, submitted.\n[3] A. Avsar et al.\, Nat. Nano.\, 14\, 674-678 (2019) & A. Avsar et al.\, Nat. Comm.\, 11\, 4806 (2020). \n \n  \n  \nAbout Speaker\n  \nDr Ahmet Avsar is an Assistant Professor and NRF Fellow in the Department of Material Science and Engineering at the National University of Singapore (NUS). Prior to joining NUS\, he was an Assistant Professor of Physics at Newcastle University (United Kingdom)\, and worked as an EPFL Fellow (co-funded by the European Marie Curie COFUND programme) at the Swiss Federal Institute of Technology Lausanne (EPFL\, Switzerland) between 2016 and 2020 after completing his PhD in Physics at NUS.\nAs an experimental condensed matter physicist specialized in two-dimensional (2D) materials\, Ahmet Avsar is interested in exploitation of the multiple quantum degrees of freedom (spin\, pseudospin and valley) available to 2D materials in the ultimate atomically thin limit for applications in energy-efficient information technologies (For more information: https://sites.google.com/site/aavsar). \nTopic: UNAM Nanocolloquium Series \nTime: Oct 14\, 2022 04:00 PM  \nHybrid Event \nUNAM Conference Hall\, \n& \nJoin Zoom Meeting \nhttps://zoom.us/j/5876884794?pwd=OUNFRTZKZDNRMm5MWjJjSlhnMXFNUT09\nMeeting ID: 587 688 4794\nPasscode: 871377 \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/spintronics-with-novel-two-dimensional-materials/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221007T160000
DTEND;TZID=Europe/Moscow:20221007T170000
DTSTAMP:20260906T150151
CREATED:20220928T063521Z
LAST-MODIFIED:20220928T063553Z
UID:6785-1665158400-1665162000@unam.bilkent.edu.tr
SUMMARY:Perfect transfer of waves
DESCRIPTION:Q-Han Park\nKorea University \n\nWaves\, both classical and quantum\, are reflected when they encounter different media or potential regions. Reflection is a fundamental property of waves underlying numerous scientific applications. Nevertheless\, in many cases removing reflection is a key issue to secure transmission and increase device efficiencies. Since the early works of Brewster and Rayleigh\, much effort has been made to remove reflection\, or achieve so called anti-reflection (AR). The most well-known AR coating\, based on a simple interference principle of optics\, only works for specific frequencies and incidence angles. Despite efforts to extend AR to broader frequency\, progress was achieved mainly by the trial-and-error optimization in designing multilayer AR structures. So far\, AR has been regarded as a technological issue without much room for further fundamental understanding. \nHere\, we uncover a principle of universal impedance matching (UIM) that allows a complete removal of reflection regardless of the incidence angle and the frequency of incoming waves. In the case of electromagnetic waves\, we reformulate the Maxwell’s equation in terms of impedance and admittance functions and directly establish the inverse scattering relation between scattered fields and material parameters\, i.e.\, permittivity and permeability. Particularly\, from the inverse scattering relation we find that the perfectly vanishing reflection\, omnidirectional and frequency independent\, can be explicitly realized by spatiotemporally dispersive materials. As a demonstration\, we introduce an UIM coating that enables the perfect transmission of white light in heterogeneous transparent media. We also present an experimental realization of UIM using metamaterials. \nThe complete removal of reflection based on UIM can be extended to various physical situations\, such as light reflection at curved surface interfaces\, reflection at the junction two different waveguides\, total internal reflections\, reflection of acoustic and elastic waves and reflection of quantum matter waves at potential steps. We explain how UIM can be extended to these physical systems and applied to practical devices. \n \n  \n  \nAbout Speaker\n  \nDr. Q-Han Park is currently Professor in Physics at Korea University in South Korea. He received his Ph.D. degree in Physics from Brandeis University\, United States in 1987. He was a Postdoctoral Research Fellow at University of Cambridge with Stephen Hawking from 1990 to 1992. Afterwards he was a research associate at CERN\, Switzerland\, a visiting scholar at MIT\, United States\, and a senior visiting fellow at the Institute of Optics\, United States. He then joined Kyunghee University in South Korea as Assistant Professor in 1992\, and moved to Korea University in 2001. \nDr. Park served as a director of Research Institute Basic Sciences in Korea\, and an associated editor for Optics Express of the Optical Society of America. Dr. Park is currently Fellow of the Korean Academy of Science and Technology\, American Optical Society\, Optical Society of Korea\, and Korean Physical Society. He is also serving as Director of the Center for Electromagnetic Metamaterials of Korea University and Consultant of Samsung Advanced Institute of Technology. He has received the prestigious Korean Science Award by the Ministry of Science and ICT in 2020. \nDr. Park’s research has been focused on high energy physics until the year of 2000 and switched to the field of optics. Since then\, he published high impact papers on optics including five papers in Nature Photonics and holds 35 patents. In earlier works\, he made significant theoretical advances in Plasmonics. His recent research topics include universal impedance matching and non-local metamaterials. He has authored more than 200 journal articles and 47 patents. More details can be found on his homepage (http://nol.korea.ac.kr/). \nTopic: Nanocolloquium Series\nTime: Oct 7\, 2022 04:00 PM Istanbul\nJoin Zoom Meeting\nhttps://zoom.us/j/5876884794?pwd=OUNFRTZKZDNRMm5MWjJjSlhnMXFNUT09\nMeeting ID: 587 688 4794\nPasscode: 871377 \n  \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/perfect-transfer-of-waves/
CATEGORIES:Nanocolloquium Series
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220922T153000
DTEND;TZID=Europe/Moscow:20220922T173000
DTSTAMP:20260906T150151
CREATED:20220921T142400Z
LAST-MODIFIED:20220921T142400Z
UID:6759-1663860600-1663867800@unam.bilkent.edu.tr
SUMMARY:Next Generation Biomonitoring: Implementing Machine Learning for Accurate Metabarcoding with Nanopore MinION
DESCRIPTION:Bilgenur Baloğlu\nUniversity of Southern California \n\nMetabarcoding (identification of the plant\, animal\, and fungal taxa present in an environmental sample) rapidly gains importance in ecology\, food safety\, pest identification\, and disease surveillance. NGS metabarcoding has a compelling advantage over traditional approaches for obtaining data on species distributions\, however\, it is often difficult to detect all the species present in a bulk sample using NGS. This can – in parts – be attributed to shorter read lengths most NGS instruments generate. Moreover\, most NGS platforms are not portable\, making in situ field-based sequencing not feasible. Oxford Nanopore sequencing platforms such as the MinION represent an exception to that and they are also known to provide longer reads albeit limited by rather high error rates (~12-15%). We used a freshwater mock community of 50 Operational Taxonomic Units (OTU) to test the capacity of the Oxford Nanopore MinION coupled with a rolling circle amplification protocol to provide long read metabarcoding results. We established a workflow for DNA metabarcoding of freshwater organisms using the Nanopore MinION sequencing platform. We also propose a new Python pipeline that explores error profiles of nanopore consensus sequences\, mapping accuracy\, and overall community representation of a complex bulk sample. Using our molecular and bioinformatics workflow that implements a machine learning algorithm\, we were able to accurately estimate the diversity of the tested freshwater mock community with an average sequence accuracy of >99% for 1D2 sequencing on the nanopore platform. We could also show that the high error rates associated with long-read single molecule sequencing can be mitigated by using a rolling circle amplification protocol. Future bioassessment programs will tremendously benefit from portable\, highly accurate\, species-level metabarcoding and it appears that we reached a point were cost-effective field-based DNA metabarcoding is possible \n \n  \nAbout Speaker\n  \nBilgenur Baloglu\, Ph.D. is a molecular biologist\, bioinformatics scientist\, and a lecturer\, based in Pasadena\, California. She studied Molecular Biology and Genetics at Istanbul Technical University and earned a Ph.D. at the National University of Singapore in Molecular Ecology\, working on the biological assessment of Singapore’s aquatic ecosystems using Next Generation Sequencing (NGS) and Nanopore sequencing. Her research interests focus on biodiversity monitoring and developing molecular and bioinformatics tools to make DNA sequencing technologies cheaper\, faster\, and more accurate. After completing her postdoctoral studies at the University of Guelph\, Canada\, she led bioinformatics efforts at Sequential Skin\, and moved to Thermo Fisher Scientific\, continuing work in bioinformatics support for NGS. She is also a part-time faculty at the University of Southern California\, teaching a course on genomic analysis using machine learning techniques. Her seminar will focus on the newly developed python based bioinformatics algorithm ASHURE that could improve the nanopore consensus sequence accuracy to >99% for bulk sample metabarcoding. \n  \n\n \n 
URL:https://unam.bilkent.edu.tr/en/event/next-generation-biomonitoring-implementing-machine-learning-for-accurate-metabarcoding-with-nanopore-minion/
CATEGORIES:UNAM Thursday Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220623T153000
DTEND;TZID=Europe/Moscow:20220623T170000
DTSTAMP:20260906T150151
CREATED:20220614T110849Z
LAST-MODIFIED:20220614T111212Z
UID:6659-1655998200-1656003600@unam.bilkent.edu.tr
SUMMARY:Connecting Atomic-scale Impurities to Larger Morphologies
DESCRIPTION:Nadire Nayir\nKaramanoglu Mehmetbey University/The Pennsylvania State University \n\n(Half) van der Waals epitaxy of single-crystal two-dimensional (2D) materials (e.g.\, TMD\, h-BN\, graphene\, group III materials) on substrates are quite challenging and time and source expensive. Therefore\, theoretically characterization of materials is essential to deepen our understanding of the physical and chemical properties of materials\, thus\, ensuring the highest quality in the design and manufacturing processes of materials.\nThis talk will first focus on our multiscale modeling efforts for the synthesis and characterization of 2D materials. I will show some of our own results which have been dedicated to addressing the major challenges encountered in experiments such as (i) unidirectional alignment of 2D domains on a substrate\, (ii) impact of the surface chemistry and crystallographic structure of a substrate on the van der Waals epitaxy\, (iii) unraveling gas-phase chemistry in chemical vapor deposition environment\, (iv) impact of growth conditions on the crystal structure of 2D materials. Additionally\, since technology is developing faster than ever before\, and increasingly depends on constantly advancing basic research and expanding scientific knowledge\, an effective-force field development for multicomponent systems has become crucial to accelerate the knowledge transfer to industry. In the second part\, this talk will also provide an overview of the ReaxFF force fields and multiscale model framework that we developed for 2D materials [4-6]. These potentials offer a computationally cost-effective and versatile research tool for the materials science community to study large-scale simulations of synthesis and defect-\, phase-\, strain-\, and edge engineering of a material of interest\, paving the way for increased application of atomic-level modeling of 2D materials. In turn\, new computational materials and new knowledge will benefit the society by advancing new technologies in energy conversion\, storage\, and other important areas. \n  \n1. N. Nayir\, M. Y. Sengul\, A. L. Costine\, P. Reinke\, S. Rajabpour\, A. Bansal\, A. Kozhakhmetov\, J. Robinson\, J. M. Redwing\, A. van Duin\, “Atomic-scale probing of defect-assisted Ga intercalation through graphene using ReaxFF Molecular Dynamics Simulations”\, Carbon\, 190\, 276–290 (2022)\n2. DR Hickey\, N Nayir\, M Chubarov\, TH Choudhury\, S Bachu\, L Miao\, Y. Wang\, C. Qian\, V. H. Crespi\, J. M. Redwing\, A. C. T. van Duin\, N. Alem “Illuminating Invisible Grain Boundaries in Coalesced Single-Orientation WS2 Monolayer Films”\, Nano Letters 21 (15)\, 6487-6495 (2021)\n3. N. Briggs\, B. Bersch\, Y. Wang\, J. Jiang\, R. J. Koch\, N. Nayir\, K. Wang\, M. Kolmer\, W. Ko\, A. D. L. F. Duran\, S. Subramanian\, C. Dong\, J. Shallenberger\, M. Fu\, Q. Zou\, Y. Chuang\, Z. Gai\, A. Li\, A. Bostwick\, C. Jozwiak\, C. Chang\, E. Rotenberg\, J. Zhu\, A. C. T. van Duin\, V. Crespi\, J. A. Robinson\, “Atomically thin half-van der Waals metals enabled by confinement heteroepitaxy”\, Nature Materials 19 (6)\, 637-643 (2020) 4. N. Nayir\, Y. K. Shin\, Y. Wang\, M. Y. Sengul\, D. Reifsnyder Hickey\, M. Chubarov\, T. H Choudhury\, N. Alem\, J. Redwing\, V. H Crespi\, A. CT van Duin\, “A ReaxFF Force Field for 2D-WS2 and Its Interaction with Sapphire”\, The Journal of Physical Chemistry C 125 (32)\, 17950-17961 (2021) 5. N. Nayir\, Y. Wang\, Y. Ji\, T. Choudhury\, J. M. Redwing\, L.-Q. Chen\, V. H. Crespi\, A. C. T. van Duin\, “Theoretical Modeling of Edge-controlled Growth Kinetics and Structural Engineering of 2D-MoSe2”\, Materials Science and Engineering: B 271\, 115263 (2021)\n6. Y. Xuan\, A. Jain\, S. Zafar\, R. Lotfi\, N. Nayir\, Y. Wang\, T. H. Choudhury\, S. Wright\, J. Feraca\, L. Rosenbaum\, J. M. Redwing\, V. Crespi\, A. C. T. van Duin\, “Multi-scale modeling of gas-phase reactions in metal-organic chemical vapor deposition growth of WSe2”\, Journal of Crystal Growth 527\, 125247 (2019) \n \nAbout The Speaker\nNadire Nayir is currently a postdoctoral research associate of Physics at Karamanoglu Mehmetbey University and a research affiliate of the 2-dimensional Crystal Consortium (2DCC) at The Pennsylvania State University. She received her BS in physics education from Selcuk University in 2009\, and Ph.D. in computational physics from Middle East Technical University in 2018. She worked as a postdoctoral associate of Mechanical Engineering at The Pennsylvania State University for 3 years. \nJoin Zoom Meeting\nhttps://zoom.us/j/5876884794?pwd=OUNFRTZKZDNRMm5MWjJjSlhnMXFNUT09https://zoom.us/j/95581724217 \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/connecting-atomic-scale-impurities-to-larger-morphologies/
CATEGORIES:UNAM Thursday Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220615T123000
DTEND;TZID=Europe/Moscow:20220615T133000
DTSTAMP:20260906T150151
CREATED:20220614T062227Z
LAST-MODIFIED:20220614T062629Z
UID:6648-1655296200-1655299800@unam.bilkent.edu.tr
SUMMARY:Probing leaky and guided exciton-polaritons in resonant planar structures
DESCRIPTION:Anton Samusev\nITMO University \n\nPlanar periodic structures such as metasurfaces and photonic crystal slabs strongly coupled to an exciton resonance attract particular attention since they provide vast opportunities for on-demand engineering of the dispersion of guided and leaky polariton resonances. In this regard\, experimental characterization and control of the over modes’ dispersion is of great importance. In this talk\, I will show both what new physical phenomena appear in such systems and how these effects can be directly observed in the experiment. \nIn the first part of the talk\, I will show an experimental approach allowing to retrieve the real [1\, 2] or even full complex [3] dispersion of both leaky and evanescent waves in arbitrary planar structures. The method is based on back focal plane microspectroscopy combined with a solid immersion lens (SIL) separated from the sample by a precisely controlled nanoscale air gap (Otto geometry). Varying the gap allows for extracting both real and imaginary parts of the wavenumber of surface waves propagating in an arbitrary in-plane direction. \nIn the second part of the talk\, I will switch gears to another implication of dispersion engineering in planar structures – the possibility of realization of strong light-matter coupling regime with excitons in transition metal dichalcogenides [4\, 5] and perovskites [6]. I will highlight the nonlinear [4\, 6] and topological [5] properties of exciton polaritons in such systems enabled by finely tuned custom designs of the photonic band structure. \nFinally\, we will discuss how to directly observe and analyze guided exciton-polaritons in planar waveguides either made of a perovskite or based on high-index dielectric slab integrated with transition metal dichalcogenide monolayer. I will show how direct variation of radiative losses via changing the SIL-sample distance in such systems allows for the control of Rabi splitting\, and extraction of exciton-photon coupling strength along with the intrinsic properties of excitons in the sample under study. \nReferences\n1. Pidgayko\, D.\, Sinev\, I.\, Permyakov\, D.\, Sychev\, S.\, Heyroth\, F.\, Rutckaia\, V.\, Schilling J.\, Lavrinenko A.\, Bogdanov A. and Samusev\, A.\, “Direct imaging of isofrequency contours of guided modes in extremely anisotropic all-dielectric metasurface”\, ACS Photonics\, Vol. 6\, No 2\, 510-515\, 2018.\n2. Permyakov\, D. V.\, Sinev\, I. S.\, Sychev\, S. K.\, Gudovskikh\, A. S.\, Bogdanov\, A. A.\, Lavrinenko\, A. V. and Samusev\, A. K.\, “Visualization of isofrequency contours of strongly localized waveguide modes in planar dielectric structures”\, JETP Letters\, vol. 107\, No 1\, 10-14\, 2018.\n3. Permyakov\, D. V.\, Kondratiev\, V. I.\, Pidgayko\, D. A.\, Sinev\, I. S. and Samusev\, A. K.\, “Probing Optical Losses and Dispersion of Fully Guided Waves through Critical Evanescent Coupling”\, JETP Letters\, vol. 113\, No 12\, 780-786\, 2021.\n4. Kravtsov\, V.\, Khestanova\, E.\, Benimetskiy\, F. A.\, Ivanova\, T.\, Samusev\, A. K.\, Sinev\, I. S.\, Pidgayko\, D. A\, Mozharov\, A. M.\, Mukhin\, I. S.\, Lozhkin\, M. S.\, Kapitonov\, Yu. V.\, Brichkin\, A. S.\, Kulakovskii\, V. D.\, Shelykh\, I. A.\, Tartakovskii\, A.I.\, Walker\, P. M.\, Skolnick\, M. S.\, Krizhanovskii \, D. N. and Iorsh\, I. V.\, “Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum”\, Light: Science & Applications\, Vol. 9\, No. 1\, 1-8\, 2020.\n5. Li\, M.\, Sinev\, I.\, Benimetskiy\, F.\, Ivanova\, T.\, Khestanova\, E.\, Kiriushechkina\, S.\, Vakulenko\, A.\, Guddala\, S.\, Skolnick\, M.\, Menon\, V. M.\, Krizhanovskii\, D.\, Alù\, A.\, Samusev\, A. and Khanikaev\, A. B.\, “Experimental observation of topological Z2 exciton-polaritons in transition metal dichalcogenide monolayers”\, Nature communications\, Vol. 12\, No 1\, 1-10.\n6. Masharin\, M. A.\, Shahnazaryan\, V. A.\, Benimetsky\, F. A.\, Krizhanovskii\, D. N.\, Shelykh\, I. A.\, Iorsh\, I. V.\, Makarov S.V. and Samusev\, A. K.\, “Polaron-enhanced polariton nonlinearity in lead halide perovskites”\, arXiv preprint arXiv:2201.10265\, 2022 \n  \n  \nAbout The Speaker\nAnton Samusev holds the position of Assistant Professor at School of Physics and Engineering\, ITMO University\, St. Petersburg\, Russia. Since the PhD defense in 2011 at Ioffe Institute\, St. Petersburg\, Russia\, he is leading a scientific group currently comprising 3 Assistant Professors\, 4 Postdocs\, PhD\, MS and BS students. The scientific interests of the group lie at the confluence of the fields of nanooptics\, solid state and laser physics. The research topics include experimental studies of the near- and far-field properties of optically resonant nanoantennas and metasurfaces weakly or strongly coupled to 2D and 3D materials with pronounced excitonic response (transition metal dichalcogenides\, perovskites)\, dispersion engineering of optical surface waves in structured media\, phase change materials\, topological photonics\, photon emission from tunnel junctions\, single-photon emitters and others. Since 2017 Anton lectures the course “Introduction to Experimental Nanophotonics” within the “Nanophotonics and metamaterials” MS program at ITMO University. \nJoin Zoom Meeting\nhttps://zoom.us/j/5876884794?pwd=OUNFRTZKZDNRMm5MWjJjSlhnMXFNUT09https://zoom.us/j/95581724217 \n\n \n 
URL:https://unam.bilkent.edu.tr/en/event/6648/
CATEGORIES:UNAM Seminars
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END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220512T133000
DTEND;TZID=Europe/Moscow:20220512T173000
DTSTAMP:20260906T150151
CREATED:20220427T131814Z
LAST-MODIFIED:20220429T072858Z
UID:6529-1652362200-1652376600@unam.bilkent.edu.tr
SUMMARY:NanoDay 2022
DESCRIPTION:  \n \nNanoDay will take place on Thursday\, May 12th this year as a hybrid event. This annual event held at Bilkent UNAM hosts the best international names in their respective fields and awards the best nano-scale visual through its NanoArt competition.  \nThis year on NanoDay\, we will be hosting two important names—Prof. Oliver Hayden from Technical University of Munich and Prof. Giulia Galla from The University of Chicago. The scientific talks will take place online via Zoom\, on May 12 at 13:30 and 15:30\, respectively. \n\nWe are happy to welcome outside participants to this event. Please register at the link below. Post-registration Zoom information will be sent to the e-mail address you provided: \nhttp://unam.bilkent.edu.tr/nanoday/ \n\nClick the link below to learn about the NanoArt competition and how to participate. The deadline for submissions is Thursday\, May 9 at 23:45. \nunam.bilkent.edu.tr/nanoday/nanoart/  \n@bilkentuniv \nNANODAY 2022 PROGRAM\n12:30 Opening with Poster Session (Unam Conference Hall)\n13:30 Prof.Oliver Hayden (online keynote speech)\n14:30 Flash Poster Presentations (online)\n15:00 Coffee Break\n15:30 Prof.Giulia Galli (online keynote speech)\n16:30 Closing and Award Announcements\n16.45 Open House \n  \nClick for registration!\nhttp://unam.bilkent.edu.tr/nanoday/\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/nanoday-2022/
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DTSTART;TZID=Europe/Moscow:20220415T160000
DTEND;TZID=Europe/Moscow:20220415T170000
DTSTAMP:20260906T150151
CREATED:20220411T070735Z
LAST-MODIFIED:20220413T054859Z
UID:6459-1650038400-1650042000@unam.bilkent.edu.tr
SUMMARY:Logistic Cellular Automata
DESCRIPTION:Seymur Jahangirov\nMSN Graduate Program and UNAM \n\nImagine a system that consists of interconnected cells each having an inner state. The inner state of each cell is changed based on the inner states of a specific subset of cells according to a certain rule. This is a general definition of cellular automata. Now replace those cells with neurons and you get a model of a brain\, replace them with a space grid and you get a model of a fluid flow\, replace them with living cells and you get a model of skin cell of an ocellated lizard. This versatility of cellular automata captured imaginations of great minds including John von Neumann\, John Conway\, Stephen Wolfram and many others. \nIn this seminar\, we will present logistic extensions of cellular automata whereby a single parameter tunes the rate of change. We show several instances of deterministic phase transitions and self-organization in these systems. Finally\, we introduce the operator representation which brings clarity to dynamics of elementary cellular automata and reveals further emergent behavior in its logistic extension. \n \n  \n  \nAbout The Speaker\n  \nDr. Seymur Jahangirov graduated from Nuclear Energy Engineering at Hacettepe University. He received his M.Sc. and Ph.D. from the Material Science and Nanotechnology program at Bilkent UNAM while contributing to seminal works on theoretical prediction of two-dimensional materials. After a postdoc at the Nano-Bio Spectroscopy Group in Spain\, he joined Bilkent UNAM faculty as Assistant Professor. Dr. Jahangirov uses state-of-the-art computational tools based on the Density Functional Theory to discover novel low-dimensional materials with intriguing properties. Dr. Jahangirov is recipient of prestigious awards including Marie Curie IEF award from ERA and TÜBA-GEBİP award from Turkish Academy of Sciences. \nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n \n 
URL:https://unam.bilkent.edu.tr/en/event/logistic-cellular-automata/
CATEGORIES:UNAM PI Seminars
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DTSTART;TZID=Europe/Moscow:20220401T160000
DTEND;TZID=Europe/Moscow:20220401T170000
DTSTAMP:20260906T150151
CREATED:20220322T132555Z
LAST-MODIFIED:20220328T121827Z
UID:6398-1648828800-1648832400@unam.bilkent.edu.tr
SUMMARY:3D laser nanoprinting
DESCRIPTION:Prof. Martin Wegener\nKarlsruhe Institute of Technology \n\nTwo-photon based 3D laser printing routinely allows for the making of complex three-dimensional sub-micrometer and nanometer structures and has become a mature\, widespread\, and commercially available technology. After briefly reviewing the basic principle and the state-of-the-art\, I focus on recent progress in my group. This includes replacing two-photon absorption by two-step absorption. This allows for using compact and inexpensive continuous-wave laser diodes instead of femtosecond lasers. \n \n  \n  \nAbout Speaker\n  \nAfter completing his Diplom and PhD in physics at Johann Wolfgang Goethe-Universität Frankfurt (Germany) in 1986 and 1987\, respectively\, he spent two years as a postdoc at AT&T Bell Laboratories in Holmdel (U.S.A.). From 1990-1995 he was professor (C3) at Universität Dortmund (Germany)\, since 1995 he is professor (C4\, later W3) at Institute of Applied Physics of Karlsruhe Institute of Technology (KIT). Since 2001 he has a joint appointment as department head at Institute of Nanotechnology (INT) of KIT\, since 2016 he is one of three directors at INT. From 2001-2014 he was the coordinator of the DFG-Center for Functional Nanostructures (CFN) at KIT. Since 2018 he is spokesperson of the Cluster of Excellence 3D Matter Made to Order. His research interests comprise ultrafast optics\, (extreme) nonlinear optics\, optical laser lithography\, photonic crystals\, optical\, mechanical\, electronic\, and thermodynamic metamaterials\, as well as transformation physics. This research has led to various awards and honors\, among which are the Alfried Krupp von Bohlen und Halbach Research Award 1993\, the Baden-Württemberg Teaching Award 1998\, the DFG Gottfried Wilhelm Leibniz Award 2000\, the European Union René Descartes Prize 2005\, the Baden-Württemberg Research Award 2005\, the Carl Zeiss Research Award 2006\, the Hector Research Award 2008\, the SPIE Prism Award 2014 for the start-up company Nanoscribe GmbH\, the Stifterverband Science Award – Erwin-Schrödinger Prize 2016\, and the Technology Transfer Prize of the German Physical Society (DPG) 2018. In 2014\, 2015\, 2016\, 2017\, 2018\, 2020\, and 2021 Clarivate Analytics listed him as “Highly Cited Researcher” (top 1%). He is Member of Leopoldina\, the German Academy of Sciences (since 2006)\, Member of acatech\, the National Academy of Science and Engineering (since 2019)\, Member of the Hector Fellow Academy (since 2013\, presently also President)\, Fellow of the Max Plack School of Photonics (since 2019)\, Fellow of the Optical Society of America (since 2008)\, and Honorary Professor at Huazhong University of Science & Technology\, Wuhan\, China (since 2014). \nTopic: Nanocolloquium series\nTime: Mar 25\, 2022 04:00 PM Istanbul\nJoin Zoom Meeting\nhttps://zoom.us/j/5876884794?pwd=OUNFRTZKZDNRMm5MWjJjSlhnMXFNUT09\n \n\n \n  \n 
URL:https://unam.bilkent.edu.tr/en/event/3d-laser-nanoprinting/
CATEGORIES:Nanocolloquium Series
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