Ultrafast charge separation at CdS quantum dot/rhodamine B molecule interface

Abdelaziz Boulesbaa; Abey Issac; Dave Stockwell; Zhuangqun Huang; Jier Huang; Jianchang Guo; Tianquan Lian

doi:10.1021/ja0773406

Ultrafast charge separation at CdS quantum dot/rhodamine B molecule interface

Abdelaziz Boulesbaa, Abey Issac, Dave Stockwell, Zhuangqun Huang, Jier Huang, Jianchang Guo, Tianquan Lian^*

^*Corresponding author for this work

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

228 Citations (Scopus)

Abstract

Ultrafast dissociation of excitons in CdS quantum dots via electron transfer to adsorbed rhodamine B (RhB) molecules was demonstrated. The rate of electron transfer can be controlled by the number of adsorbates attached on the nanoparticle and transfer time as fast as 12 picoseconds was observed. The rapid and controllable charge separation in this model quantum dot-adsorbate complex provides a potential approach for separating multiple excitons before the exciton-exciton annihilation process.

Original language	English
Pages (from-to)	15132-15133
Number of pages	2
Journal	Journal of the American Chemical Society
Volume	129
Issue number	49
DOIs	https://doi.org/10.1021/ja0773406
Publication status	Published - Dec 12 2007
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja0773406

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AU - Boulesbaa, Abdelaziz

AU - Issac, Abey

AU - Stockwell, Dave

AU - Huang, Zhuangqun

AU - Huang, Jier

AU - Guo, Jianchang

AU - Lian, Tianquan

PY - 2007/12/12

Y1 - 2007/12/12

N2 - Ultrafast dissociation of excitons in CdS quantum dots via electron transfer to adsorbed rhodamine B (RhB) molecules was demonstrated. The rate of electron transfer can be controlled by the number of adsorbates attached on the nanoparticle and transfer time as fast as 12 picoseconds was observed. The rapid and controllable charge separation in this model quantum dot-adsorbate complex provides a potential approach for separating multiple excitons before the exciton-exciton annihilation process.

AB - Ultrafast dissociation of excitons in CdS quantum dots via electron transfer to adsorbed rhodamine B (RhB) molecules was demonstrated. The rate of electron transfer can be controlled by the number of adsorbates attached on the nanoparticle and transfer time as fast as 12 picoseconds was observed. The rapid and controllable charge separation in this model quantum dot-adsorbate complex provides a potential approach for separating multiple excitons before the exciton-exciton annihilation process.

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Ultrafast charge separation at CdS quantum dot/rhodamine B molecule interface

Abstract

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