TITLE

Reversible adsorption-enhanced quantum confinement in semiconductor quantum dots

AUTHOR(S)
Sarkar, Shaibal K.; Chandrasekharan, Nirmala; Gorer, Sasha; Hodes, Gary
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/23/2002, Vol. 81 Issue 26, p5045
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Semiconductor quantum dots possess two important properties: Size-dependent increase in band gap (size quantization) and a very high surface-to-volume ratio. We show that cyanide adsorption on this high surface further increases the size quantization in films of CdSe and CdS quantum dots and that removal of the cyanide reverses this effect. This effect is explained by increased localization due to compression of the electron wave function in the dots by the strongly adsorbed [on both Cd and Se(S)] negatively charged cyanide.
ACCESSION #
8691521

 

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