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X-WR-CALNAME:GRK 2905 - Ultrafast Nanoscopy
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X-WR-CALDESC:Events for GRK 2905 - Ultrafast Nanoscopy
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DTSTART;TZID=Europe/Berlin:20250704T140000
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CREATED:20250526T081344Z
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SUMMARY:RTG Colloquium:Jan Vogelsang & Gerti Beliu
DESCRIPTION:2 pmFrom single‐molecule fluorescence spectroscopy to (fast) super‐resolution microscopySuper‐resolution (SR) microscopy has revolutionized far‐field fluorescence imaging by overcoming the diffraction limit of light. The technique relies fundamentally on the ability to detect single fluorescent molecules\, and the first part will focus on achieving this\, which requires carefully optimized technical and photophysical needs\, including the manipulation of fluorophore behavior through photoinduced redox reactions. The second part will focus on a novel approach using DNA origami nanoantennas to dramatically enhance fluorescencesignals in single‐molecule experiments. Such nanoantennas can increase the fluorescence of single molecules by an order of magnitude\, which increases the time resolution and facilitates the observation of ultrafast processes such as thediffusive barrier crossing events between two potential energy minima in disordered proteins. \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nDr. Jan VogelsangUniversity of RegensburgInstitute of Experimental and Applied Physics \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n3 pmClick. Tag. Image –A Hitchhiker’s Guide to Molecular BioimagingSuper‐resolution microscopy holds the promise of visualizing molecular processes in cells with nanometer precision. However\, realizing this potential requires labeling strategies that are not only bright and site‐specific\, but also biologically orthogonal. Many commonly used labeling approaches interfere with protein function or fail to access conformationally restricted or sterically masked epitopes in live‐cell environments. In our work\, we develop and apply biochemical labeling strategies that combine genetic code expansion\, bioorthogonal click chemistry\, and fluorogenic dyes to overcome these limitations. By minimizing linkage errors and enabling stoichiometric labeling under native conditions\, we aim to push the limits of resolution\, specificity\, and functional integrity in molecular imaging. This talk will provide an overview of our toolbox\, recent applications\, and future directions for nanoscale imaging of proteins in living systems.Venue: RUN auditorium \n\n\n\n\n\n\n\n\n\n\n\n\n\nProf. Dr. Gerti BeliuUniversity of RegensburgInstitute of Pharmacy
URL:https://grk2905.de/event/grk-colloquiumjan-vogelsang-gerti-beliu/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/png:https://grk2905.de/wp-content/uploads/2025/05/Vogelsang_Beliu.png
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DTSTART;TZID=Europe/Berlin:20250711T140000
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CREATED:20250526T081439Z
LAST-MODIFIED:20260326T162438Z
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SUMMARY:RTG Colloquium:Ulrich Höfer
DESCRIPTION:Formation of Floquet-Bloch bands in solidsPeriodic driving of electrons in solids by strong light fields can lead to the formation of Floquet- Bloch bands\, i.e.\, sidebands separated by multiples of the driving frequency. The induced change of the electronic structure is one route to materials design by light. In 2009\, Oka proposed that circularly polarized light can turn the semimetal graphene into a Chern insulator in this way. While transport experiments could so far not provide compelling evidence for the predicted anomalous Hall effect\, time-resolved photoemission has clearly demonstrated the formation of Floquet-Bloch bands for several materials\, including graphene. Moreover\, with subcycle resolution\, it has become possible to reveal their ultrafast build-up. These experiments show that Floquet sidebands emerge after a single optical cycle\, concurrently with intraband acceleration of the electrons.Venue: RUN auditorium
URL:https://grk2905.de/event/grk-colloquiumulrich-hofer/
CATEGORIES:Colloquium
ATTACH;FMTTYPE=image/jpeg:https://grk2905.de/wp-content/uploads/2025/05/Hoefer-edited.jpg
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