Long-Lived Delocalized Electron States in Quantum Dots: A Step-Scan Fourier Transform Infrared Study

Moonsub Shim; Sergej V. Shilov; Mark S. Braiman; Philippe Guyot-Sionnest

doi:10.1021/jp994107o

Long-Lived Delocalized Electron States in Quantum Dots: A Step-Scan Fourier Transform Infrared Study

Moonsub Shim, Sergej V. Shilov, Mark S. Braiman, Philippe Guyot-Sionnest

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

Visible light-induced IR absorption in colloidal CdSe quantum dots is observed by step-scan FTIR spectroscopy. Size dependence and the effect of surface modification are investigated. The introduction of surface hole trap states enhances and prolongs the IR absorption in photoexcited quantum dots. Our measurements reveal long-lived (>1 ms) delocalized electron states in 6 nm average diameter dots capped with thiocresol.

Original language	English (US)
Pages (from-to)	1494-1496
Number of pages	3
Journal	Journal of Physical Chemistry B
Volume	104
Issue number	7
DOIs	https://doi.org/10.1021/jp994107o
State	Published - Feb 24 2000

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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title = "Long-Lived Delocalized Electron States in Quantum Dots: A Step-Scan Fourier Transform Infrared Study",

abstract = "Visible light-induced IR absorption in colloidal CdSe quantum dots is observed by step-scan FTIR spectroscopy. Size dependence and the effect of surface modification are investigated. The introduction of surface hole trap states enhances and prolongs the IR absorption in photoexcited quantum dots. Our measurements reveal long-lived (>1 ms) delocalized electron states in 6 nm average diameter dots capped with thiocresol.",

author = "Moonsub Shim and Shilov, {Sergej V.} and Braiman, {Mark S.} and Philippe Guyot-Sionnest",

year = "2000",

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AU - Braiman, Mark S.

AU - Guyot-Sionnest, Philippe

PY - 2000/2/24

Y1 - 2000/2/24

N2 - Visible light-induced IR absorption in colloidal CdSe quantum dots is observed by step-scan FTIR spectroscopy. Size dependence and the effect of surface modification are investigated. The introduction of surface hole trap states enhances and prolongs the IR absorption in photoexcited quantum dots. Our measurements reveal long-lived (>1 ms) delocalized electron states in 6 nm average diameter dots capped with thiocresol.

AB - Visible light-induced IR absorption in colloidal CdSe quantum dots is observed by step-scan FTIR spectroscopy. Size dependence and the effect of surface modification are investigated. The introduction of surface hole trap states enhances and prolongs the IR absorption in photoexcited quantum dots. Our measurements reveal long-lived (>1 ms) delocalized electron states in 6 nm average diameter dots capped with thiocresol.

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Long-Lived Delocalized Electron States in Quantum Dots: A Step-Scan Fourier Transform Infrared Study

Abstract

ASJC Scopus subject areas

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