Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.21: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Fluorescence Correlation Spectroscopy (FCS) experiments in polystyrene solutions — •Heiko Zettl1, Alexander Böker1, Michael Lanzendörfer2, Axel Müller2, and Georg Krausch1 — 1Physikalische Chemie II, Universität Bayreuth — 2Makromolekulare Chemie II, Universität Bayreuth
Fluorescence Correlation Spectroscopy (FCS) is a well known method to determine the diffusion coefficients of single molecules in solution. In this technique it is observed how long it takes until a single molecule passes a small (ca 1 fl) volume illuminated by a laser. All experiments so far are done in aqueous enviroment.
To use this method in polymer physics we synthesized different polymers, which were end-functionalised with a single OH-Group. The end group was coupled with the fluorescent dye Rhodamine B. All steps of the synthesis of a dye labelled polystyrene (Mw=10000 g/mol) were analysed by MALDI-TOF.
The polymers we used to determine the diffusion coefficient in dependence of the molecular weight in a range of 10 kg/mol up to 1000 kg/mol.