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Volumn 11, Issue 3, 2011, Pages 1049-1054

Manipulating coupling between a single semiconductor quantum dot and single gold nanoparticle

Author keywords

blinking; hybrid nanostructures; Nanomanipulation; photoluminescence; plasmonics; semiconductor nanocrystals

Indexed keywords

BLINKING; HYBRID NANOSTRUCTURES; NANOMANIPULATIONS; PLASMONICS; SEMICONDUCTOR NANOCRYSTALS;

EID: 79952595796     PISSN: 15306984     EISSN: 15306992     Source Type: Journal    
DOI: 10.1021/nl103906f     Document Type: Article
Times cited : (149)

References (47)
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    • For all PL trajectories, the threshold cutoff was set to 50% of the difference between the maximum and minimum emission count rate.
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    • Another possibility for the discrepancy in the lifetimes is a long time decrease in the QD's PL lifetimes. Assembly and characterizing these structures may take a few hours to complete. We have measured the long time change in lifetime of bare QDs in air and measured decreases in lifetime of up to 5 ns over a few hours. We can speculate that this may be caused by photooxidation.
    • Another possibility for the discrepancy in the lifetimes is a long time decrease in the QD's PL lifetimes. Assembly and characterizing these structures may take a few hours to complete. We have measured the long time change in lifetime of bare QDs in air and measured decreases in lifetime of up to 5 ns over a few hours. We can speculate that this may be caused by photooxidation.
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    • A few factors contribute to the experimental uncertainties in both total decay rate and PL enhancements. The error in fitting individual total decay time is small, ∼0.1 ns. The decay rate, however, does fluctuate over time up to a few nanoseconds for bare QDs. In measurement of PL enhancement, a QD not exactly at the center of the confocal excitation spot leads to a smaller photon count rate. In addition, the presence of a metallic NP may change the collection efficiency of PL from a QD.
    • A few factors contribute to the experimental uncertainties in both total decay rate and PL enhancements. The error in fitting individual total decay time is small, ∼0.1 ns. The decay rate, however, does fluctuate over time up to a few nanoseconds for bare QDs. In measurement of PL enhancement, a QD not exactly at the center of the confocal excitation spot leads to a smaller photon count rate. In addition, the presence of a metallic NP may change the collection efficiency of PL from a QD.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.