Extreme thermal stability of carbon nanotubes
Extreme thermal stability of carbon nanotubes
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DOI：
10.1002/pssb.200776148
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发表时间：
2007-11-01
影响因子：
1.6
通讯作者：
Zettl, A.
中科院分区：
文献类型：
--
作者：
Begtrup, G. E.;Ray, K. G.;Zettl, A.
碳-碳键的多功能性创造了丰富非凡的物理特性。在两种常见的碳的同素异素中，金刚石（sp-3键合）表现出创纪录的导热性，但它是亚稳定的，在高温下会转变为石墨。石墨（sp-2）是导电的，但在低至2400 K的温度下会升华。碳纳米管（也称为sp-2）利用sp-2杂化碳-碳键的非凡强度，表现出高导电性和热导电性以及巨大的机械强度。本文报道了一种测量纳米系统热性能的新技术。我们应用该技术来确定多壁碳纳米管的最终高温击穿。(c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim。
The versatility of carbon-carbon bonding creates a wealth of extraordinary physical properties. Of the two common allotropes of carbon, diamond (sp-3 bonded) exhibits record thermal conductivity but is meta-stable and transits to graphite at elevated temperatures. Graphite (sp-2) is electrically conducting but sublimes at temperatures as low as 2400 K. Carbon nanotubes (also sp-2) capitalize on the extraordinary strength of the sp-2 hybridized carbon-carbon bond and exhibit high electrical and thermal conductivities as well as tremendous mechanical strength. Here we report a new technique to measure the thermal proper-ties of nanosystems. We apply this technique to determine the ultimate high temperature breakdown of multiwalled carbon nanotubes. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.