Ultrafast Charge Separation at CdS Quantum Dot/Rhodamine B Molecule Interface

Ultrafast Charge Separation at CdS Quantum Dot/Rhodamine B Molecule Interface

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. Th...

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Veröffentlicht in:Journal of the American Chemical Society 2007-12, Vol.129 (49), p.15132-15133
Hauptverfasser: Boulesbaa, Abdelaziz, Issac, Abey, Stockwell, Dave, Huang, Zhuangqun, Huang, Jier, Guo, Jianchang, Lian, Tianquan
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container_end_page 15133
container_issue 49
container_start_page 15132
container_title Journal of the American Chemical Society
container_volume 129
creator Boulesbaa, Abdelaziz
Issac, Abey
Stockwell, Dave
Huang, Zhuangqun
Huang, Jier
Guo, Jianchang
Lian, Tianquan
description 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.
doi_str_mv 10.1021/ja0773406
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title Ultrafast Charge Separation at CdS Quantum Dot/Rhodamine B Molecule Interface
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