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X-WR-CALDESC:Events for UNAM Nanoteknoloji Araştırma Merkezi
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DTSTART:20220101T000000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240725T110000
DTEND;TZID=Europe/Moscow:20240725T120000
DTSTAMP:20260905T184821
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20240516T080000
DTEND;TZID=Europe/Moscow:20240516T170000
DTSTAMP:20260905T184821
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2024/05/Sergey-Gaponenko.jpg
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231116T153000
DTEND;TZID=Europe/Moscow:20231116T170000
DTSTAMP:20260905T184821
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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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220922T153000
DTEND;TZID=Europe/Moscow:20220922T173000
DTSTAMP:20260905T184821
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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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220623T153000
DTEND;TZID=Europe/Moscow:20220623T170000
DTSTAMP:20260905T184821
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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