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Blocked Electron Transfer and Suppressed Blinking of Single CdSe/ZnS Quantum Dots in Agarose Gel
Author(s) -
Ko H. C.,
Yuan C. T.,
Lin S. H.,
Tang Jau
Publication year - 2010
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201000075
Subject(s) - chemistry , quantum dot , agarose , fluorescence , electron , electron transfer , particle (ecology) , förster resonance energy transfer , charge (physics) , chemical physics , nanotechnology , analytical chemistry (journal) , photochemistry , optics , chromatography , physics , quantum mechanics , materials science , oceanography , geology
Fluorescence blinking is an interesting phenomenon commonly observed in single molecule/particle spectroscopy and has attracted wide interest recently. Such behavior in quantum dots is undesirable for applications as fluorescence markers. In this report, we observed suppressed blinking for single CdSe/ZnS quantum dots mixed in agarose gel. We attributed the suppression to an increase in activation energy so that the charge transfer is blocked from the neutral light state to the charged dark state as the gel concentration increases.