Is the intrinsic thermoelectric power of carbon nanotubes positive?

被引：221

作者：

Bradley, K

Jhi, SH

Collins, PG

Hone, J

Cohen, ML

Louie, SG

Zettl, A ^{[1
]}

机构：

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

[2] Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.85.4361

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The thermoelectric power (TEP) of single-walled carbon nanotubes (SWNTs) is extremely sensitive to gas exposure history. Samples exposed to air or oxygen have an always positive TEP, suggestive of holelike carriers. However, at fixed temperature the TEP crosses zero and becomes progressively more negative as the SWNTs are stripped of oxygen. The time constant for oxygen adsorption/desorption is strongly temperature dependent and ranges from seconds to many days, leading to apparently "variable" TEP for a given sample at a given temperature. The saturated TEP can be accounted for within a model of strong oxygen doping of the semiconducting nanotubes.

引用

页码：4361 / 4364

页数：4

共 19 条

[1]

Blatt FJ, 1976, THERMOELECTRIC POWER, DOI 10.1007/978-1-4613-4268-7

[2]

CHUI ES, IN PRESS SYNTH MET

[3] Extreme oxygen sensitivity of electronic properties of carbon nanotubes [J].