Evidence for re-crystallization process in the irradiated graphite with heavy ions obtained by Raman spectroscopy | |
Xu, Lijun2; Sun, Youmei2; Hou, Mingdong2; Zhang, Shengxia1,2; Guo, Hang1,2; Yao, Huijun2; Duan, Jinglai2; Zeng, Jian2; Liu, Jie2; Zhai, Pengfei2 | |
刊名 | CARBON |
2016-05-01 | |
卷号 | 101页码:22-27 |
ISSN号 | 0008-6223 |
DOI | 10.1016/j.carbon.2016.01.076 |
英文摘要 | Highly oriented pyrolytic graphite (HOPG) was irradiated with 40.5 MeV Sn-112 ions at a range of fluence: 1 x 10(12)-1 x 10(14) ions/cm(2). A new Raman band was observed at similar to 864 cm(-1) which grows with increasing the irradiation fluence. This band has been observed in Raman spectra of HOPG and natural graphite crystal edge planes, only when the incident light is polarized perpendicular to the basal planes and it has been assigned to the out-of-plane Raman-inactive B-2g mode which becomes Raman active due to a slight rearrangement of lattice structure at the edge. However, we first obtained this band in Raman spectra of basal planes of irradiated HOPG with the polarization of the incident light parallel to the basal planes. Then, a half-wave plate was used to change the polarization direction of the incident light in the HOPG basal planes. The intensity of the band at 864 cm(-1) is almost independent of the incident light polarization direction. We suggest that re-crystallized graphite with random lattice orientations are formed during ion irradiation, which gives rise to the B-2g band. The conclusion is confirmed by transmission electron microscopy images, showing that there are some randomly orientated nanoscale graphite crystals surrounded by amorphous carbon. (C) 2016 Elsevier Ltd. All rights reserved. |
资助项目 | National Natural Science Foundation of China[11405229] ; National Natural Science Foundation of China[11179003] ; National Natural Science Foundation of China[10975164] |
WOS关键词 | Scattering |
WOS研究方向 | Chemistry ; Materials Science |
语种 | 英语 |
出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
WOS记录号 | WOS:000370816000004 |
资助机构 | National Natural Science Foundation of China |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.186/handle/113462/41940] |
专题 | 近代物理研究所_兰州重离子研究装置 近代物理研究所_材料研究中心 |
作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, Lijun,Sun, Youmei,Hou, Mingdong,et al. Evidence for re-crystallization process in the irradiated graphite with heavy ions obtained by Raman spectroscopy[J]. CARBON,2016,101:22-27. |
APA | Xu, Lijun.,Sun, Youmei.,Hou, Mingdong.,Zhang, Shengxia.,Guo, Hang.,...&Zhai, Pengfei.(2016).Evidence for re-crystallization process in the irradiated graphite with heavy ions obtained by Raman spectroscopy.CARBON,101,22-27. |
MLA | Xu, Lijun,et al."Evidence for re-crystallization process in the irradiated graphite with heavy ions obtained by Raman spectroscopy".CARBON 101(2016):22-27. |
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