Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction
Structural properties of carbon peapods under extreme conditions studied using in situ x-ray diffraction
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DOI：
10.1103/physrevb.74.205425
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发表时间：
2006-11-01
影响因子：
3.7
通讯作者：
Kataura, H.
中科院分区：
文献类型：
--
作者：
Chorro, M.;Rols, S.;Kataura, H.
通过原位 X 射线衍射研究了在高压/高温条件 (HPHT) 下捕获到单壁碳纳米管 (SWNT) 中的碳豆荚 (C-60) 的结构特性。研究了 HPHT 处理下 C-60 链结构以及填充对 SWNT 变化的影响。证明了单壁碳纳米管内部合成了 C-60 一维聚合物链。在 4 GPa 下，将温度升高至 1023 摄氏度会导致 C-60 逐渐聚合，这与 C-60-C-60 距离缩短至 8.7 A 相关。回到环境条件，C-60 链保持聚合状态，强调了该材料的高稳定性。此外，我们的数据强烈表明二维邦德晶格在压力下会发生对称性变化。
Structural properties of carbon peapods, C-60, trapped into single-walled carbon nanotubes (SWNT), have been studied under high-pressure/high-temperature conditions (HPHT) by in situ x-ray diffraction. The C-60 chain structure together with the influence of the filling on the SWNT change under HPHT treatment is investigated. Synthesis of a one-dimensional polymer chain of C-60 inside the single-walled carbon nanotubes is evidenced. At 4 GPa, increasing the temperature up to 1023 degrees C leads to a progressive C-60 polymerization that is associated to a shortening of C-60-C-60 distance down to 8.7 A. Back to ambient conditions, the C-60 chain remains polymerized, emphasizing the high stability of this material. In addition, our data strongly suggest a symmetry change of the two-dimensional bunde lattice under pressure.