BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//UNAM Nanoteknoloji Araştırma Merkezi - ECPv6.0.6.2//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://unam.bilkent.edu.tr/en
X-WR-CALDESC:Events for UNAM Nanoteknoloji Araştırma Merkezi
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Moscow
BEGIN:STANDARD
TZOFFSETFROM:+0300
TZOFFSETTO:+0300
TZNAME:MSK
DTSTART:20220101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20241002T103000
DTEND;TZID=Europe/Moscow:20241002T123000
DTSTAMP:20260905T141232
CREATED:20240925T061309Z
LAST-MODIFIED:20240925T061434Z
UID:9011-1727865000-1727872200@unam.bilkent.edu.tr
SUMMARY:Design meets evolution: Theory and practice
DESCRIPTION:Víctor de Lorenzo\nThe Spanish National Research Council (CSIC) \n\nDesign meets evolution: Theory and practice\n \nThe prevailing view of biological evolution is not unlike bricolage/pastiche/tinkering—in sharp contrast with rational engineering. Yet\, different paths often lead to solutions that coincide or converge whether they emerge from naturally-occurring evolution or rationally designed. Such a conjunction—often presented as a mere anecdote— in fact reveals the ability of biological systems to physically explore solution spaces and gravitate towards information-rich attractors\, which can be found through different routes. This scenario evokes one of heterotic computing\, a non-conventional type of data processing in which the solution to a problem is not delivered through numerical calculations but through its embodiment in a material object. Once left to undergo a physical process the object manages a large number of parameters for reaching a multi objective optimum. The course of information is thus a physical flow and the outcome is a physical currency. The consequences of this notion for bioengineering are remarkable\, as it enables solutions to multi-objective optimization challenges not yet amenable to all-rational approaches. The ensuing technical question is how to bring about hyper-diversification not only of genomic sequences but also environmental parameters for securing the desired performance of a given synthetic device. This issue will be illustrated with a number of practical cases where naturally-occurring or artificially enhanced variability was key to find ideal outcomes to otherwise intractable design hitches of interest for industrial and environmental biotechnology. \nAl-ramahi et al. (2021) ssDNA recombineering boosts in vivo evolution of nanobodies displayed on bacterial surfaces. Comms Biology 4: 1169.\nTas et al. (2020) Contextual dependencies expand the re-usability of genetic inverters. Nature Comms 12: 355.\nEspeso et al. (2020) An automated DIY framework for experimental evolution of Pseudomonas putida. Microb Biotechnol. 14: 2679-2685\nHueso-Gil et al. (2023) In vivo sampling of intracellular heterogeneity of Pseudomonas putida enables multiobjective optimization of genetic devices. ACS Synth Biol. 12: 1667-1676.\nAkkaya et al. (2019) Evolving metabolism of 2\,4-dinitrotoluene triggers SOS-independent diversification of host cells. Env Microbiol 21: 314-326 \n  \n \n  \nAbout speaker\nVíctor de Lorenzo (Madrid\, 1957) is a Chemist by training and he holds a position of Research Professor in the Spanish National Research Council (CSIC)\, where he currently heads the Laboratory of Environmental Synthetic Biology at the National Center for Biotechnology. After his PhD at the CSIC Institute of Enzymology (1983)\, he worked at the Pasteur Institute (1984)\, the University of California at Berkeley (1985-1987)\, the University of Geneva (1988) and the Federal Center for Biotechnology in Braunschweig until 1991\, the year in which he joined the CSIC in Madrid. He specializes in Molecular Biology and Biotechnology of soil microorganisms (particularly Pseudomonas putida) as agents for the decontamination of sites damaged by industrial waste. At present\, his work explores the interface between Synthetic Biology and Environmental Biotechnology\, including global-scale bioremediation interventions for counteracting climate change. In 2001 this work received the National Award Rey Jaime I for Environmental Protection. In June 2008 he was honored with the GSK International Award of the American Society for Microbiology\, and in October of the same year he was granted a Grand Prix of the French Academy of Sciences. He is a member of the EMBO (European Molecular Biology Organization) and the American and European Academies of Microbiology\, and he has co-chaired with Anne Glover the President’s Science and Technology Council of the EC during the Barroso Administration. He served as a member of the World Economic Forum Council on Future Biotechnologies (Dubai\, 2016-2018) and received a Honorary doctorate of the DTU (Lyngby\, Denmark 2022). \n \n  \n  \n\n  \n 
URL:https://unam.bilkent.edu.tr/en/event/design-meets-evolution-theory-and-practice/
CATEGORIES:Nanocolloquium Series
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/09/victor-de-lorenzo.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240508T110000
DTEND;TZID=Europe/Moscow:20240508T123000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/04/Stefan-Rotter_sq.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240417T110000
DTEND;TZID=Europe/Moscow:20240417T143000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/04/etatar_photo.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240306T110000
DTEND;TZID=Europe/Moscow:20240306T123000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/02/Philip-Biggin.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240228T110000
DTEND;TZID=Europe/Moscow:20240228T123000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/02/nd_p.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231218T110000
DTEND;TZID=Europe/Moscow:20231218T123000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/12/Irina_Mitina.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231110T160000
DTEND;TZID=Europe/Moscow:20231110T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/11/Arthur-Goetschy.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231020T160000
DTEND;TZID=Europe/Moscow:20231020T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/10/Michael-E.-Flatte_.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231013T160000
DTEND;TZID=Europe/Moscow:20231013T170000
DTSTAMP:20260905T141232
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:20230407T160000
DTEND;TZID=Europe/Moscow:20230407T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/04/Amin-Sadeghpour-Dilmaghani.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221125T160000
DTEND;TZID=Europe/Moscow:20221125T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/11/Alexey-Berdyugin.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221014T160000
DTEND;TZID=Europe/Moscow:20221014T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/10/ahmet-avsar.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20221007T160000
DTEND;TZID=Europe/Moscow:20221007T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/09/Q-Han-Park.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220401T160000
DTEND;TZID=Europe/Moscow:20220401T170000
DTSTAMP:20260905T141232
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/03/Martin-Wegener.jpg
END:VEVENT
END:VCALENDAR