Carbon nanohorns under cold compression to 40 GPa: Raman scattering and X-ray diffraction experiments
文献类型：期刊论文
| 作者 | Li, Bo1,2,3; Nan, Yanli1; Zhao, Xiang2,3; Song, Xiaolong1; Li, Haining4; Wu, Jie4; Su, Lei4,5 |
| 刊名 | APPLIED PHYSICS LETTERS
 |
| 出版日期 | 2017-11-27 |
| 卷号 | 111期号:22 |
| 英文摘要 | We report a high-pressure behavior of carbon nanohorns (CNHs) to 40GPa at ambient temperature by in situ Raman spectroscopy and synchrotron radiation x-ray diffraction (XRD) in a diamond anvil cell. In Raman measurement, multiple structural transitions are observed. In particular, an additional band at similar to 1540cm(-1) indicative of sp(3) bonding is shown above 35GPa, but it reverses upon releasing pressure, implying the formation of a metastable carbon phase having both sp(2) and sp(3) bonds. Raman frequencies of all bands (G, 2D, D+G, and 2D') are dependent upon pressure with respective pressure coefficients, among which the value for the G band is as small as similar to 2.65 cm(-1) GPa(-1) above 10 GPa, showing a superior high-pressure structural stability. Analysis based on mode Gruneisen parameter demonstrates the similarity of high-pressure behavior between CNHs and single-walled carbon nanotubes. Furthermore, the bulk modulus and Gruuneisen parameter for the G band of CNHs are calculated to be similar to 33.3 GPa and 0.1, respectively. In addition, XRD data demonstrate that the structure of post-graphite phase derives from surface nanohorns. Based on topological defects within conical graphene lattice, a reasonable transformation route from nanohorns to the post-graphite phase is proposed. Published by AIP Publishing. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38327]  |
| 专题 | 化学研究所_光化学实验室 |
| 作者单位 | 1.Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China 2.Xi An Jiao Tong Univ, Inst Chem Phys, Sch Sci, Xian 710049, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Sch Sci, Dept Chem, Xian 710049, Shaanxi, Peoples R China 4.Zhengzhou Univ Light Ind, Ctr High Pressure Sci & Technol Res, Zhengzhou 450002, Henan, Peoples R China 5.Chinese Acad Sci, Inst Chem, Key Lab Photochem, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Bo,Nan, Yanli,Zhao, Xiang,et al. Carbon nanohorns under cold compression to 40 GPa: Raman scattering and X-ray diffraction experiments[J]. APPLIED PHYSICS LETTERS,2017,111(22). |
| APA | Li, Bo.,Nan, Yanli.,Zhao, Xiang.,Song, Xiaolong.,Li, Haining.,...&Su, Lei.(2017).Carbon nanohorns under cold compression to 40 GPa: Raman scattering and X-ray diffraction experiments.APPLIED PHYSICS LETTERS,111(22). |
| MLA | Li, Bo,et al."Carbon nanohorns under cold compression to 40 GPa: Raman scattering and X-ray diffraction experiments".APPLIED PHYSICS LETTERS 111.22(2017). |
入库方式： OAI收割
来源：化学研究所
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