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X-WR-CALNAME:UNAM Nanoteknoloji Araştırma Merkezi
X-ORIGINAL-URL:https://unam.bilkent.edu.tr/en
X-WR-CALDESC:Events for UNAM Nanoteknoloji Araştırma Merkezi
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TZID:Europe/Moscow
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DTSTART:20230101T000000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231108T153000
DTEND;TZID=Europe/Moscow:20231108T170000
DTSTAMP:20260906T213820
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
ATTACH;FMTTYPE=image/jpeg:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/10/Mikhail-Artemyev.jpg
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231110T160000
DTEND;TZID=Europe/Moscow:20231110T170000
DTSTAMP:20260906T213820
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
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BEGIN:VEVENT
DTSTART;TZID=Europe/Moscow:20231116T153000
DTEND;TZID=Europe/Moscow:20231116T170000
DTSTAMP:20260906T213820
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
ATTACH;FMTTYPE=image/png:https://unam.bilkent.edu.tr/en/wp-content/uploads/2023/11/Emre-Ozan-Polat.png
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