Polymerization of single-wall carbon nanotubes under high pressures and high temperatures
Polymerization of single-wall carbon nanotubes under high pressures and high temperatures
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DOI：
10.1021/jp025983w
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发表时间：
2002-10-31
影响因子：
3.3
通讯作者：
Rakhmanina, AV
中科院分区：
文献类型：
--
作者：
Khabashesku, VN;Gu, ZN;Rakhmanina, AV
在1.5，8.0和9.5GPa以及200至1500 ℃的温度范围内，在活塞-气缸或“Toroid”型高压装置中，对单壁碳纳米管（SWNT）的压力-温度诱导转变进行了调查研究。结果发现，高压和高温的组合效应产生的单壁碳纳米管结构的不可逆变化，在相反的可逆效应，高压单独，以前研究的几个研究小组。拉曼、电子显微镜和X射线衍射数据表明，随着处理温度和压力的升高，单壁碳纳米管通过sp（3）C-C键共价连接。新的碳结构的形成，如纳米和微晶类金刚石（立方和六方）和纳米石墨相在较高的压力（8.0和9.5 GPa）已被观察到。
Survey studies of pressure-temperature-induced transformations of single-wall carbon nanotubes (SWNT) at 1.5, 8.0, and 9.5 GPa and temperatures ranging from 200 to 1500 degreesC in a piston-cylinder or "Toroid" type high pressure devices, have been carried out. It was found that the combined effects of high pressures and high temperatures produce irreversible changes in the SWNT structure, in contrast with the reversible effect of,high pressure alone, previously studied by several research groups. The Raman, electron microscopy, and X-ray diffraction data obtained in the present work provide evidence for covalent interlinking of SWNT by sp(3) C-C bonds which escalates with the increasing treatment temperature and pressure. The formation of new carbon structures such as nano- and, microcrystalline diamond-like (cubic and hexagonal) and nanographite phases under higher pressures (8.0 and 9.5 GPa) has been observed.