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首页> 外文期刊>Advanced Functional Materials >Thermal and Structural Characterizations of Individual Single-, Double-, and Multi-Walled Carbon Nanotubes
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Thermal and Structural Characterizations of Individual Single-, Double-, and Multi-Walled Carbon Nanotubes

机译：单壁，双壁和多壁碳纳米管的热和结构表征

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摘要

Thermal conductance measurements of individual single- (S), double- (D), and multi- (M) walled (W) carbon nanotubes (CNTs) grown using thermal chemical vapor deposition between two suspended microthermometers are reported. The crystal structure of the measured CNT samples is characterized in detail using transmission electron microscopy (TEM). The thermal conductance, diameter, and chirality are all determined on the same individual SWCNT. The thermal contact resistance per unit length is obtained as 78-585 m K W~(-1) for three as-grown 10-14 nm diameter MWCNTs on rough Pt electrodes, and decreases by more than 2 times after the deposition of amorphous platinum-carbon composites at the contacts. The obtained intrinsic thermal conductivity of approximately 42-48, 178-336, and 269-343 W m~(-1) K~(-1) at room-temperature for the three MWCNT samples correlates well with TEM-observed defects spaced approximately 13, 20, and 29 nm apart, respectively; whereas the effective thermal conductivity is found to be limited by the thermal contact resistance to be about 600 W m~(-1) K~(-1) at room temperature for the as-grown DWCNT and SWCNT samples without the contact deposition.
机译：报告了使用两个悬浮式微型温度计之间的热化学气相沉积法生长的单个（S），双（D）和多（M）壁（W）碳纳米管（CNT）的热导测量结果。使用透射电子显微镜（TEM）对测得的CNT样品的晶体结构进行详细表征。导热系数，直径和手性均在同一单个SWCNT上确定。对于在粗糙的Pt电极上的三个生长的直径10-14 nm的MWCNT，每单位长度的热接触电阻为78-585 m KW〜（-1），并且在非晶态铂-沉积后降低了2倍以上。触点处的碳复合材料。三个MWCNT样品在室温下获得的大约42-48、178-336和269-343 W m〜（-1）K〜（-1）的固有热导率与TEM观察到的大约间隔开的缺陷有很好的相关性相距13、20和29 nm；而对于没有接触沉积的DWCNT和SWCNT样品，在室温下有效的热导率受到热接触电阻的限制，约为600 W m〜（-1）K〜（-1）。

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  • 来源
    《Advanced Functional Materials》 |2009年第24期|3918-3925|共8页
  • 作者

    Michael T. Pettes; Li Shi;

  • 作者单位

    Department of Mechanical Engineering and the Center for Nano and Molecular Science and Technology Texas Materials Institute University of Texas at Austin Austin, TX 78712 (USA);

    Department of Mechanical Engineering and the Center for Nano and Molecular Science and Technology Texas Materials Institute University of Texas at Austin Austin, TX 78712 (USA);

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