Raman spectroscopy and time-resolved photoluminescence of BN and BxCyNz nanotubes

被引：195

作者：

Wu, J

Han, WQ

Walukiewicz, W ^{[1
]}

Ager, JW

Shan, W

Haller, EE

Zettl, A

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

来源：

NANO LETTERS | 2004年 / 4卷 / 04期

关键词：

D O I：

10.1021/nl049862e

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report Raman and time-resolved photoluminescence spectroscopic studies of multiwalled BN and BxCyNz nanotubes. The Raman spectroscopy shows that the as-grown BxCyNz nanotubes are radially phase separated into BN shells and carbon shells. The photoluminescence decay process is characterized by two time constants that are attributed to intra- and inter-BN sheet charge recombination, respectively. A comparison of the photoluminescence of BN nanotubes to that of hexagonal BN is consistent with the existence of a spatially indirect band gap in multiwalled BN nanotubes as predicted by theory.

引用

页码：647 / 650

页数：4

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