Direct measurement of off-state trapping rate fluctuations in single quantum dot fluorescence.
basic_science · Level V
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- Record sourced from PubMed, PMID 21732607.
- Also identified by DOI 10.1021/nl2017674.
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Abstract
Fluorescence decay times measured during the off-state of single CdSe/ZnS quantum dot blinking are found to decrease with increasing off-state duration, contradicting the charging model widely considered to explain the blinking phenomenon. The change in the nonradiative process of a short off-state duration compared to a long one is investigated here through simultaneous measurement of fluorescence decay and blinking behavior. The results are investigated in the framework of two models based on fluctuating trapping rates.