Thermal conductivity of single-walled carbon nanotubes
Thermal conductivity of single-walled carbon nanotubes
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DOI：
10.1103/physrevb.59.r2514
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发表时间：
1999-01-15
影响因子：
3.7
通讯作者：
Zettl, A
中科院分区：
文献类型：
--
作者：
Hone, J;Whitney, M;Zettl, A
我们测量了单壁碳纳米管晶体绳的热导率kappa(T)在350 ~ 8 K范围内随温度的变化而平稳下降，在30 K以下表现为线性变化。与电导率实验的比较表明，单个纳米管的室温热导率可以与金刚石或平面内石墨的热导率相媲美，而给定样品的热导率与电导率的比值表明，热导率在所有温度下都由声子主导。在30 K以下，kappa(T)的线性温度依赖性和估计大小表明声子的平均自由程与能量无关，近似于0.5-1.5 μ m [S0163-1829(99)50404-9]。
We have measured the temperature-dependent thermal conductivity kappa(T) of crystalline ropes of single-walled carbon nanotubes from 350 K to 8 K. kappa(T) decreases smoothly with decreasing temperature, and displays linear temperature dependence below 30 K. Comparison with electrical conductivity experiments indicates that the room-temperature thermal conductivity of a single nanotube may be comparable to that of diamond or in-plane graphite, while the ratio of thermal to electrical conductance for a given sample indicates that the thermal conductivity is dominated by phonons at all temperatures. Below 30 K, the linear temperature dependence and estimated magnitude of kappa(T) imply an energy-independent phonon mean free path of similar to 0.5-1.5 mu m. [S0163-1829(99)50404-9].