Document Detail

Universality of the fluorescence intermittency in nanoscale systems: experiment and theory.
MedLine Citation:
PMID:  23272638     Owner:  NLM     Status:  Publisher    
A variety of optically active nanoscale objects show extremely long correlations in the fluctuations of fluorescence intensity (blinking). Here we performed a systematic study to quantitatively estimate the power spectral density (PSD) of the fluorescence trajectories of colloidal and self-assembled quantum dots (QDs), nanorods (NRs), nanowires (NWs), and organic molecules. We report for the first time a statistically correct method of PSD estimation suitable for these systems. Our method includes a detailed analysis of the confidence intervals. The striking similarity in the spectra of these nanoscale systems, including even a "non-blinking" quantum dot investigated by the Krauss group [Wang et al., Nature 2009, 459, 685-689], is a powerful evidence for the existence of a universal physical mechanism underlying the blinking phenomenon in all these fluorophores [Frantsuzov at al., Nat. Phys. 2008, 4, 519-522]. In this paper we show that the features of this universal mechanism can be captured phenomenologically by the multiple recombination center model (MRC) we suggested recently for explaining single colloidal QD intermittency. Within the framework of the MRCs we qualitatively explain all the important features of fluorescence intensity fluctuations for a broad spectrum of nanoscale emitters.
Pavel Frantsuzov; Sandor Volkan-Kacso; Boldizsar Janko
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-12-31
Journal Detail:
Title:  Nano letters     Volume:  -     ISSN:  1530-6992     ISO Abbreviation:  Nano Lett.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-12-31     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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