Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Poster Session I

CPP 20.35: Poster

Montag, 12. März 2018, 17:30–19:30, Poster A

Covalent dye functionalization of single-walled carbon nanotubes — •Gririraj Manoharan¹, Henrik Flötotto², Petra Bösel¹, René Wieczorek¹, Jan Kurzhals¹, Paul Kögerler², Wolfgang Harneit¹, Claire Besson³, and Carola Meyer¹ — ¹Fachbereich Physik, Universität Osnabrück, Deutschland — ²Institut für Anorganische Chemie, RWTH Aachen, Deutschland — ³Department of Chemistry, The George Washington University, Washington, DC 20052, USA

Dye-functionalized carbon nanotubes (CNTs) have great potential for application in light-harvesting devices, in optical sensors, and in biosensing. Covalent attachment allows for high selectivity and stability of the reaction. It can be applied after a CNT has been contacted with electrodes to avoid surface or contact contamination. Our goal is to use CNTs as containers to place spin carriers next to shallow NV centers in diamond for quantum sensing.

We present covalent functionalization of single-walled CNTs with the Alexa Fluor^® 594 dye, characterizing the individual steps of the chemical route. Dye-functionalized CNTs are dispersed on oxygen-terminated diamond and located by their fluorescence for co-localization with NV centers. An open question is whether a CNT in the vicinity of a shallow NV center quenches NV luminescence. We check this by monitoring the fluorescence of the stable color centers during bleaching of the dye molecules.