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BP: Fachverband Biologische Physik

BP 8: Bioimaging and Biospectroscopy

BP 8.1: Vortrag

Montag, 22. März 2021, 14:00–14:20, BPb

Near Infrared Fluorescence Imaging with Carbon nanotubes and Nanosheets — •Sebastian Kruss — Ruhr-Universität Bochum, Germany

We are interested in 1D and 2D materials that provide novel photophysical properties such as near Infrared (NIR) fluorescence. The NIR range (800-1700 nm) of the spectrum is beneficial for many optical applications because it falls into the tissue transparency window. One example of such a material is semiconducting single-walled carbon nanotubes (SWCNTs). SWCNTs fluoresce in the NIR and their optoelectronic properties are very sensitive to changes in the chemical environment and they are therefore versatile building blocks for fluorescent labels and sensors. In my talk I will show fundamental insights into SWCNT photophysics/surface chemistry and how selectivity of SWCNT-based fluorescent sensors can be enhanced. These sensors can be used for multiscale imaging to resolve single molecules such as kinesin motors in vivo, efflux of neurotransmitters (dopamine, serotonin) from cells, identification of pathogens or stress in whole plants. Furthermore, I introduce a novel class of ultrabright 2D NIR fluorescent silicate nanosheets and demonstrate in vivo particle tracking as well as standoff detection in living plants.