title: Fluorescence decay time of single semiconductor nanocrystals.
abstract: We present fluorescence decay measurements of single ZnS covered CdSe nanocrystals. It is shown that the fluorescence decay time is fluctuating during the investigation leading to a multiexponential decay even for a single nanocrystal. In combination with measurements of the fluorescence blinking behavior we find that a high fluorescence intensity is correlated with a long fluorescence decay time. This is consistent with a model of fluctuating nonradiative decay channels leading to variable dynamic quenching processes of the excited state.
authors.affiliation: Institute for Physical Chemistry, University of Mainz, Welderweg 11, D-55099 Mainz, Germany.
authors.forename: Germar
authors.initials: G
authors.lastname: Schlegel
authors.forename: Jolanta
authors.initials: J
authors.lastname: Bohnenberger
authors.forename: Inga
authors.initials: I
authors.lastname: Potapova
authors.forename: Alf
authors.initials: A
authors.lastname: Mews