Electronic and optical properties of nitrogen-doped multiwalled carbon nanotubes

被引：179

作者：

Lim, SH ^{[1
]}

Elim, HI

Gao, XY

Wee, ATS

Ji, W

Lee, JY

Lin, J

机构：

[1] Inst Chem & Engn Sci, Singapore 627833, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 119260, Singapore

[3] Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117576, Singapore

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.73.045402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Highly nitrogen-doped carbon nanotube (CNxNT, x=12 at. %) was synthesized by the pyrolysis of acetonitrile on Co-Mo catalysts. The electronic structures and chemical bondings of CNxNT were studied using various spectroscopic techniques: Raman, photoelectron and x-ray absorption spectroscopies. The ultrafast pump-probe measurements of CNxNT exhibited a larger third-order susceptibility chi((3)), a relaxation time of tau(2)=1 ps and improved saturable absorption, as compared with undoped multiple-walled carbon nanotubes, which indicate that N-doping can improve all-optical switching properties of carbon nanotubes.

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页数：6

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