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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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DTSTART:20210101T000000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220415T160000
DTEND;TZID=Europe/Moscow:20220415T170000
DTSTAMP:20260905T211135
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/04/seymur-jahangirov.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220318T160000
DTEND;TZID=Europe/Moscow:20220318T170000
DTSTAMP:20260905T211135
CREATED:20220316T111506Z
LAST-MODIFIED:20220316T111506Z
UID:6357-1647619200-1647622800@unam.bilkent.edu.tr
SUMMARY:Fibers for optics and structures
DESCRIPTION:Hasan Yılmaz\nMSN Graduate Program and UNAM \n\nOptical fibers are versatile waveguides that have numerous application areas such as telecommunication\, lasers\, biomedical and infrared (IR) optics. Hollow-core optical fibers (HCFs) are microstructured fibers with a hollow-core surrounded by cladding elements that further diversify the applications of fibers in nonlinear optics\, chemical sensing\, plasma generation and many others. The recent simplified cladding structures of HCFs have demonstrated considerable improvement on the optical performances and have the capability of outperforming the solid-core fibers. The selection of fiber’s material plays a crucial role to guide the light in the IR region. Materials such as semiconductors (Si and Ge)\, chalcogenides\, silica-based glasses and even polymers can be used for infrared light transmission by the virtue of the hollow-core and low material absorption. Furthermore\, fibers are used as structural materials within composites by forming the filler part. The body of aircrafts\, sports cars\, yacht and the blades of wind turbines are made by fiber-based composites. The usage of fibers in flexible electronics is another important field that seeks for the electrical conductivity with light-weight approaches. In our laboratory\, Contemporary Fibers Lab (CFL)\, we investigate several types of fibers for light guidance\, composites and electrical conductivity. \nIn this talk\, I will introduce the present research activities in our laboratory by briefly discussing selected present/future projects. The development of optical fibers including the modelling\, fabrication and characterization by multiple materials will cover the first part of the talk. In the second part\, I will focus on the work for improving the mechanical properties of structural fibers by the nanoparticles and flexible conductive fibers. \n \n  \n  \nAbout Speaker\nDr. Mustafa Ordu is a principal investigator in UNAM-National Nanotechnology Research Center and Institute of Materials Science and Nanotechnology at Bilkent University. He received his B.Sc. and M.Sc. degrees in Mechanical Engineering from Istanbul Technical University\, Turkey and Tohoku University\, Japan\, respectively. He completed his Ph.D. studies at Boston University in 2018 on semiconductor-core optical fibers for infrared light guidance. He worked as a postdoctoral researcher on the topics of hollow-core optical fibers and laser micromachining of fibers at XLIM Research Institute\, France before joining Bilkent University. His research interests focus on a variety optical fibers\, particularly for applications in infrared optics. Also\, he has several research projects on glass fibers as structural materials. \nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217
URL:https://unam.bilkent.edu.tr/en/event/fibers-for-optics-and-structures/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/03/mustafa-ordu.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20220121T160000
DTEND;TZID=Europe/Moscow:20220121T170000
DTSTAMP:20260905T211135
CREATED:20220118T113120Z
LAST-MODIFIED:20220118T113120Z
UID:6242-1642780800-1642784400@unam.bilkent.edu.tr
SUMMARY:What can we learn from computational cell models?
DESCRIPTION:Aykut Erbaş\nMSN Graduate Program and UNAM \n\nThere are over 40 million cells in our body. Despite carrying an identical genome\, these cells are specialized into 200 different types to undertake particular biological tasks in various tissues. The main factor determining a cell’s biological identity is the type and amount of cell-specific proteins. In turn\, these cell-specific proteins somewhat determine how\, when\, where\, and which part of genetic information encoded in our DNA will be read to sustain the dynamic complexity of cellular activity. One of the questions that we ask in our research group: can we use minimal computational models to reveal certain parts of this complexity? By considering the kinetics and organizational properties of DNA-binding proteins\, in this talk\, I will present a couple of examples to convince you that computer simulations can be used\, along with biomolecular experiments\, to elucidate the dynamic and organizational properties of the genome. Together we will see that well-designed molecular models can replicate experimental findings and encourage us to reconsider even re-write certain parts of our text-books. \n \n  \n  \nAbout Speaker\nDr. Aykut Erbaş completed his Ph.D. in Physics at Technical University Munich (TUM)\, Germany\, in 2011. His Ph.D. thesis contributed to the understanding of biomolecular mobility\, specifically\, of disordered protein structures. Later he moved to the Chemistry Department at the University of North Carolina – Chapel Hill to research polymer dynamics. Between 2014 and 2018\, Dr. Erbas was a research fellow at the Material Science & Engineering Department at Northwestern University under various centers dedicated to designing bio-inspired energy systems. He also researched the interaction kinetics of biomolecular systems and molecular self-assembly in collaboration with Northwestern Biomolecular Sciences and Chemistry Departments. Dr. Erbas has been actively working on various soft-matter systems in close collaboration with experimental and engineering groups. He is currently interested in the kinetics aspects of protein-DNA interactions and 3d genome organization in his lab. Dr. Erbas has been an assistant professor at UNAM since September 2018 \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/what-can-we-learn-from-computational-cell-models/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2022/01/AYKUT-ERBAS.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211224T160000
DTEND;TZID=Europe/Moscow:20211224T170000
DTSTAMP:20260905T211135
CREATED:20211221T101709Z
LAST-MODIFIED:20211221T101709Z
UID:6149-1640361600-1640365200@unam.bilkent.edu.tr
SUMMARY:Control of Static Electricity By Light and Polymer Mechanochemistry
DESCRIPTION:Bilge Baytekin\nMSN Graduate Program and UNAM \n\nThe mechanism of static electricity generation and mitigation on insulator surfaces upon rubbing/contact is one of the few scientific questions that have remained unanswered for millennia. Static charging (tribocharging) of insulators is not just a scientific mystery – it is also a significant problem\, especially critical for various industries\, e.g.\, polymer\, pharmaceuticals\, electronics\, and space. Several methods of tribocharge mitigation exist in practice; however\, none can reach the practicality of using light in the process. Here I will present light-controlled mitigation of triboelectric charges on common polymers. The tribocharged polymers are discharged upon illumination with appropriate wavelengths of light in the presence of a mediator organic dye. Our method provides spatial and temporal control on mitigation of static charges on common polymer surfaces by a mechanism that involves photoexcitation of organic dyes\, allowing an additional ‘wavelength control’. \nMechanochemistry of organics and polymers has long been studied\, but the link between the static electricity of polymers and mechanochemistry – despite its obvious presence – is still overlooked. In this talk\, I present this chemical link and show how the mechanochemical pathways and the generated mechanospecies can be used to make composites in a green chemistry way. \n \nKonuşmacı hakkında\nBilge Baytekin is an Assistant Professor in the Chemistry Department of Bilkent University. She received her Ph.D. from Freie Universitat Berlin and pursued her postdoctoral studies (2009-2014) at Northwestern University and Harvard University. Her research interests include static electricity\, organic and polymer mechanochemistry\, smart materials\, and soft robotics. She is the recipient of the Loreal Unesco for Women in Science\, TÜBA GEBIP\, BAGEP\, Mustafa Parlar Vakfı\, TÜBİTAK Teşvik Awards\, and 2019 Rising Star Award from the Electrostatics Society of America (ESA). She likes poetry and tea. She has a lovely daughter. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/control-of-static-electricity-by-light-and-polymer-mechanochemistry/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2021/12/bilge-baytekin-500.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211217T160000
DTEND;TZID=Europe/Moscow:20211217T170000
DTSTAMP:20260905T211135
CREATED:20211213T074324Z
LAST-MODIFIED:20211213T074324Z
UID:6119-1639756800-1639760400@unam.bilkent.edu.tr
SUMMARY:Plasmon-Enhanced Light-Matter Interactions at the Nanoscale
DESCRIPTION:Wonmi Ahn\nMSN Graduate Program and UNAM \n\nNoble metal nanoparticles supporting collective oscillations of conduction electrons\, i.e.\, surface plasmon resonances\, exhibit excellent light-focusing ability and high spectral sensitivity to changes in the surrounding medium. These capabilities explain the increasing role of plasmonic nanomaterials in nanoimaging\, sensing\, energy\, and biomedical applications. However\, high dissipative losses in plasmonic metals and the lack of mass-production methods have been severe bottlenecks preventing their practical use in many applications. In this seminar\, I will show some of the approaches we have taken in the past to overcome the challenges in the field of plasmonics\, which have eventually led to the development of new classes of optoplasmonic materials and bottom-up nanofabrication methods. I will also show how we exploited the dissipative plasmonic loss\, which has been a significant drawback\, to generate hot carriers that drive chemical reactions. Beyond plasmonics\, I will also discuss light-matter interactions in the strong coupling regime (for both excitonic and vibrational absorbers)\, which have great potential to modify materials’ physical and chemical properties by light. The talk will conclude with future research directions that may spark interdisciplinary collaboration within the UNAM community. \n \nKonuşmacı hakkında\nWonmi Ahn obtained a Bachelor of Engineering degree in Chemical Engineering from Soongsil University in South Korea and a Ph.D. degree in Materials Science and Engineering from the University of Utah in the United States. She undertook postdoctoral research at Boston University in the United States and continued her research at the U.S. Naval Research Laboratory as a National Research Council postdoctoral fellow of the United States and later worked as a Materials Research Scientist. She has published more than 21 research papers\, including one U.S. Patent on a nanofabrication method based on electroless metal plating technique. Her research interests include light-matter interactions in the strong coupling regime\, plasmonic nanomaterials for photocatalysis\, plasmon-enhanced photoelectrochemistry\, and photonic-plasmonic hybrid materials for sensing applications. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/plasmon-enhanced-light-matter-interactions-at-the-nanoscale/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2021/12/21Sep2021_Wonmi_Ahn.png
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211119T160000
DTEND;TZID=Europe/Moscow:20211119T170000
DTSTAMP:20260905T211135
CREATED:20211115T112644Z
LAST-MODIFIED:20211115T122531Z
UID:6030-1637337600-1637341200@unam.bilkent.edu.tr
SUMMARY:Exploring electronic correlations in low dimensional materials
DESCRIPTION:T. SERKAN KASIRGA\nMSN Graduate Program and UNAM \n\nStrong electronic correlations among various degrees of freedoms in solids result in the emergence of fascinating phenomena. To name a few we can list metal-insulator transitions\, charge density wave transitions and superconductivity. However\, these phenomena are notoriously difficult to study experimentally as they are typically associated with phase transitions that are extremely sensitive to the defects and impurities in the materials. In this talk\, I will present our efforts to understand the phase transitions in some exemplary materials and present a journey from materials synthesis to characterization of the properties via electrical\, mechanical and optical methods. First\, I will talk about how we synthesize the materials in a unique setup that allows real-time optical observation of the crystal synthesis. Then\, I will talk about the effect of thickness on the phase transitions and how we use light to measure certain properties of the correlated materials. Overall\, I will try to give a general perspective on our efforts and conclude with open questions. \n \nAbout The Speaker\nDr. Kasırga got his bachelor’s degree from Bilkent University in physics in 2009. Then\, he moved to the University of Washington\, Seattle for his Ph.D. in physics. After completing his Ph.D. in 2013\, he moved to Bilkent University as a principal investigator at the National Nanotechnology Research Center (UNAM) and established a research program. Since 2015\, he has been serving as the associate director of UNAM and since 2016 he is co-affiliated with the department of physics. His research has appeared in prestigious journals in his field such as Nature\, Nature Nanotechnology\, Nano Letters and 2D Materials. For these research efforts\, the Academy of Science awarded him the Young Scientist Award (GEBİP) in 2021. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217 \n\n 
URL:https://unam.bilkent.edu.tr/en/event/exploring-electronic-correlations-in-low-dimensional-materials/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2021/11/t-serkan-kasirga.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20211112T160000
DTEND;TZID=Europe/Moscow:20211112T170000
DTSTAMP:20260905T211135
CREATED:20211115T122209Z
LAST-MODIFIED:20211115T132854Z
UID:6052-1636732800-1636736400@unam.bilkent.edu.tr
SUMMARY:How does self-organization reduce entropy?
DESCRIPTION:ÖMER İLDAY\nMSN Graduate Program and UNAM \n\nSelf-organization is the spontaneous emergence of an ordered state. Despite its ubiquity\, how self-organization reduces entropy was never clarified. In this talk\, we present a new theoretical framework\, whereby we decompose a self-organized system into two parts\, one that gets ordered and another that reduces the entropy of the former by mutual information generated through a feedback process. We show that the combined system simply evolves to higher total entropy\, which inadvertently reduces the entropy of the organized part. \nSelf-organization is notoriously difficult to direct to a specific pattern. Our new framework suggests a route. We need to ensure that the desired pattern has higher feedback gain than the competing ones. We also introduce stimulated symmetry breaking as means to reshape the feedback gain landscape. As a proof of concept\, we experimentally demonstrate directing a self-organization process\, namely\, nonlinear laser lithography\, to create all 2D Bravais lattices. \n \n  \nAbout The Speaker\nDr. F. Ömer Ilday studied theoretical physics at Boğaziçi University\, Istanbul\, Turkey\, graduating valedictorian in 1998. He took his Ph.D. in applied physics from Cornell University\, USA\, in 2003. He worked at MIT from 2003 to 2006. In 2006\, he joined Bilkent University as a faculty member. He was awarded the European Research Council’s prestigious Consolidator Grant in 2013\, the first ERC grant on basic science in Turkey\, and the ERC Proof of Concept Grant in 2021. He has published ten articles in Nature\, Nature Photonics\, Nature Physics\, and Nature Communications. His contributions to science have been generously recognized through the Findlay Award\, TÜBA-GEBIP Award\, Teşvik Award (TÜBİTAK)\, Engin Arık Science Award from the Turkish Physical Society\, and the top award in science in Turkey\, the Science Award of TÜBİTAK. He has been elected as a member of the Science Academy of Turkey and Academia Europaea. \n\nJoin Zoom Meeting\nhttps://zoom.us/j/95581724217
URL:https://unam.bilkent.edu.tr/en/event/how-does-self-organization-reduce-entropy/
CATEGORIES:UNAM PI Seminars
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2021/11/omer-ilday.jpg
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