Reversible Surface Oxidation and Efficient Luminescence Quenching in Semiconductor Single-Wall Carbon Nanotubes
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- 作者：Gordana Dukovic ; Brian E. White ; Zhiyong Zhou ; Feng Wang ; Steffen Jockusch ; Michael L. Steigerwald ; Tony F. Heinz ; Richard A. Friesner ; Nicholas J. Turro ; and Louis E. Brus
- 刊名：Journal of the American Chemical Society
- 出版年：2004
- 出版时间：November 24, 2004
- 年：2004
- 卷：126
- 期：46
- 页码：15269 - 15276
- 全文大小：327K
- 年卷期：v.126,no.46(November 24, 2004)
- ISSN：1520-5126
文摘
We have investigated reversible single-wall carbon nanotube (SWNT) oxidation by quantitativeanalysis of the oxide-induced absorption bleaching and luminescence quenching at low pH. These data,in combination with DFT structure calculations, suggest that the nanotube oxide is a 1,4-endoperoxide. Atlow pH, the endoperoxide protonates to create a hydroperoxide carbocation, introducing a hole in the SWNTvalence band. Nanotube luminescence is extremely sensitive to quenching by hole-doping, while theabsorption is relatively robust.