Probing the photoluminescence properties of gold nanoclusters by fluorescence lifetime correlation spectroscopy

The Journal of Chemical Physics
C T YuanJ Tang

Abstract

Gold nanoclusters (Au NCs) have attracted much attention for promising applications in biological imaging owing to their tiny sizes and biocompatibility. So far, most efforts have been focused on the strategies for fabricating high-quality Au NCs and then characterized by conventional ensemble measurement. Here, a fusion single-molecule technique combining fluorescence correlation spectroscopy and time-correlated single-photon counting can be successfully applied to probe the photoluminescence (PL) properties for sparse Au NCs. In this case, the triplet-state dynamics and diffusion process can be observed simultaneously and the relevant time constants can be derived. This work provides a complementary insight into the PL mechanism at the molecular levels for Au NCs in solution.

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Citations

Jun 9, 2014·Analytical and Bioanalytical Chemistry·Radek MacháňMartin Hof
Oct 14, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Cheng-Wei LiuChi-Tsu Yuan

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Methods Mentioned

BETA
fluorescence correlation spectroscopy
FCS
fluorescence lifetime correlation spectroscopy
fluorescence correlation
electrophoresis
conventional

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