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Proceedings Paper

Probing the interactions of single CdSe quantum dots with their local environment
Author(s): Felix Koberling; Alf Mews; Inga Potapova; Thomas Basche
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Paper Abstract

The fluorescence blinking of single CdSe/ZnS nanocrystals under different experimental conditions is investigated. We show that the blinking process is very sensitive to the particle environment even if the nanocrystals are covered with a few monolayers of ZnS. Especially the presence of oxygen leads to a shortening of the on-times but leaves the off-times almost unaffected. Therefore, oxygen which is adsorbed to the surface might act as a scavenger for photo generated electrons and leaves the particle in its (positively charged) dark state.

Paper Details

Date Published: 5 December 2001
PDF: 8 pages
Proc. SPIE 4456, Controlling and Using Light in Nanometric Domains, (5 December 2001); doi: 10.1117/12.449535
Show Author Affiliations
Felix Koberling, Johannes-Gutenberg-Univ. Mainz (Germany)
Alf Mews, Johannes-Gutenberg-Univ. Mainz (Germany)
Inga Potapova, Johannes-Gutenberg-Univ. Mainz (Germany)
Thomas Basche, Johannes-Gutenberg-Univ. Mainz (Germany)

Published in SPIE Proceedings Vol. 4456:
Controlling and Using Light in Nanometric Domains
Aaron Lewis; H. Kumar Wickramasinghe; Katharina H.B. Al-Shamery, Editor(s)

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