Regensburg 2019 – wissenschaftliches Programm
CPP 25.39: Poster
Dienstag, 2. April 2019, 14:00–16:00, Poster B1
Dynamic Fluorescence Properties of Graphene Quantum Dots — •Christian Wimmenauer1, Ralf Künemuth2, Stefan Fasbender1, Claus A M Seidel2, and Thomas Heinzel1 — 1Institute of Experimantal Condensed Matter Physics, Heinrich-Heine-University Düsseldorf — 2Institute of Physical Chemistry, Heinrich-Heine-University Düsseldorf
Graphene quantum dots (GQDs) are a promising candidate for various biomedical applications ranging from drug delivery to single particle tracking, due to their small size and low toxicity. To characterize GQDs concerning their viability as a fluorescence marker time correlated single photon counting and fluorescence correlation spectroscopy are employed. The fluorescence lifetime, the time scales of different dark states and the diffusive properties are determined. Dark states are discussed for coupled and uncoupled GQDs at different pH values. The measured properties allow for an assessment of the usability in biomedical applications, such as single particle tracking or super resolution microscopy.