Probing the interactions of single CdSe quantum dots with their local environment

Felix Koberling; Alf Mews; Inga Potapova; Thomas Basche

doi:10.1117/12.449535

5 December 2001 Probing the interactions of single CdSe quantum dots with their local environment

Felix Koberling, Alf Mews, Inga Potapova, Thomas Basche

Proceedings Volume 4456, Controlling and Using Light in Nanometric Domains; (2001) https://doi.org/10.1117/12.449535
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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.

Citation Download Citation

Felix Koberling, Alf Mews, Inga Potapova, and Thomas Basche "Probing the interactions of single CdSe quantum dots with their local environment", Proc. SPIE 4456, Controlling and Using Light in Nanometric Domains, (5 December 2001); https://doi.org/10.1117/12.449535

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