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Proceedings Paper

Control of photophysical and photochemistry of colloidal quantum dots via metal and metal-oxide coated substrates
Author(s): S. M. Sadeghi; A. Nejat
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Paper Abstract

We studied how deposition of a very thin layer of gold or chromium oxide on glass substrates can modify the way irradiation changes the fluorescence of CdSe/ZnS quantum dots. We found that the gold layer tends to shield the quantum dots from the substrate, preventing photoinduced fluorescence enhancement caused by the Coulomb blockage. In this case the emission of the quantum dots did not show also any broadening but rather a slight red shift, independent of the irradiation time. In the case of the chromium-oxide coated substrates we observed significant broadening and blue shift, indicating such oxide could enhance photo-oxidation of colloidal quantum dots significantly.

Paper Details

Date Published: 29 March 2013
PDF: 6 pages
Proc. SPIE 8634, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X, 86340L (29 March 2013); doi: 10.1117/12.2005764
Show Author Affiliations
S. M. Sadeghi, The Univ. of Alabama in Huntsville (United States)
A. Nejat, Boston Univ. (United States)


Published in SPIE Proceedings Vol. 8634:
Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X
Kurt G. Eyink; Diana L. Huffaker; Frank Szmulowicz, Editor(s)

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