Thermal stability and structural changes of double-walled carbon nanotubes by heat treatment
Thermal stability and structural changes of double-walled carbon nanotubes by heat treatment
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DOI：
10.1016/j.cplett.2004.09.024
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发表时间：
2004-11-01
影响因子：
2.8
通讯作者：
Dresselhaus, MS
中科院分区：
文献类型：
--
作者：
Kim, YA;Muramatsu, H;Dresselhaus, MS
我们首次描述了双壁碳纳米管束（DWNTs）的顺序结构变化作为热处理温度的函数。DWNTs（内径> ~ 0.9 nm）在2000度高温下结构稳定。在2100度以上，相邻的小碳纳米管的外壁开始聚结成大直径的管。在高于2100℃的温度下，观察到三种不同类型的结构：(a)大直径DWNTs；(b)多壁碳纳米管（MWNTs）和(c)片状碳。结果表明，低碳纳米管比单壁纳米管稳定得多，其稳定性与MWNTs相当。(C) 2004 Elsevier B.V.版权所有
We describe, for the first time, the sequential structural changes of bundles of double-walled carbon nanotubes (DWNTs) as a function of heat treatment temperature. DWNTs (inner diameters >0.9 nm) are structurally stable up to 2000 degreesC. Above 2100 degreesC, the outer walls of adjacent DWNTs start coalescing into large diameter tubes. At temperatures higher than 2100 degreesC, three different types of structures were observed: (a) large-diameter DWNTs; (b) multi-walled carbon nanotubes (MWNTs), and (c) flaky carbons. The results demonstrate that DWNTs are much more stable than SWNTs, and their stability is comparable to that of MWNTs. (C) 2004 Elsevier B.V. All rights reserved.