Optical measurement of thermal transport in suspended carbon nanotubes

被引：90
作者：
Hsu, I-Kai [1 ]
Kumar, Rajay [1 ]
Bushmaker, Adam [1 ]
Cronin, Stephen B. [1 ]
Pettes, Michael T. [2 ,3 ]
Shi, Li [2 ,3 ]
Brintlinger, Todd [4 ,5 ,6 ]
Fuhrer, Michael S. [4 ,5 ,6 ]
Cumings, John [4 ,5 ,6 ]
机构：
[1] Univ So Calif, Dept Mat Sci & Elect Engn, Los Angeles, CA 90089 USA
[2] Univ Texas Austin, Texas Mat Inst, Dept Mech Engn, Austin, TX 78712 USA
[3] Univ Texas Austin, Texas Mat Inst, Ctr Nano & Mol Sci & Technol, Austin, TX 78712 USA
[4] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[5] Univ Maryland, Ctr Supercond Res, College Pk, MD 20742 USA
[6] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 06期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.2829864
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Thermal transport in carbon nanotubes is explored using different laser powers to heat suspended single-walled carbon nanotubes similar to 5 mu m in length. The temperature change along the length of a nanotube is determined from the temperature-induced shifts in the G band Raman frequency. The spatial temperature profile reveals the ratio of the contact thermal resistance to the intrinsic thermal resistance of the nanotube. Moreover, the obtained temperature profiles allow differentiation between diffusive and ballistic phonon transport. Diffusive transport is observed in all nanotubes measured and the ratio of thermal contact resistance to intrinsic nanotube thermal resistance is found to range from 0.02 to 17. (c) 2008 American Institute of Physics.
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页数：3
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