Thermal probing of energy dissipation in current-carrying carbon nanotubes

被引：84

作者：

Shi, Li ^{[1
,2
]}

Zhou, Jianhua ^{[1
,2
]}

Kim, Philip ^{[3
]}

Bachtold, Adrian ^{[4
]}

Majumdar, Arun ^{[5
,6
]}

McEuen, Paul L. ^{[7
]}

机构：

[1] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[2] Univ Texas Austin, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA

[3] Columbia Univ, Dept Phys, New York, NY 10027 USA

[4] Campus Univ Autonoma Barcelona, Inst Catala Nanotecnol, CSIC, Ctr Invest Nanociencia & Nanotecnol, E-08193 Barcelona, Spain

[5] Univ Calif Berkeley, Dept Mech Engn, Berkeley, CA 94720 USA

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

[7] Cornell Univ, Atom & Solid State Phys Lab, Ithaca, NY 14853 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 105卷 / 10期

基金：

美国国家科学基金会;

关键词：

carbon nanotubes; scanning probe microscopy; temperature distribution; thermal conductivity; thermal diffusivity; TRANSPORT; SCATTERING; CONDUCTIVITY; ABSENCE; VOLTAGE; PHASE;

D O I：

10.1063/1.3126708

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The temperature distributions in current-carrying carbon nanotubes have been measured with a scanning thermal microscope. The obtained temperature profiles reveal diffusive and dissipative electron transport in multiwalled nanotubes and in single-walled nanotubes when the voltage bias was higher than the 0.1-0.2 eV optical phonon energy. Over 90% of the Joule heat in a multiwalled nanotube was found to be conducted along the nanotube to the two metal contacts. In comparison, about 80% of the Joule heat was transferred directly across the nanotube-substrate interface for single-walled nanotubes. The average temperature rise in the nanotubes is determined to be in the range of 5-42 K per microwatt Joule heat dissipation in the nanotubes.

引用

页数：5

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