Raman spectrum study of graphite irradiated by swift heavy ions

doi:10.1088/1674-1056/23/12/126105

	Raman spectrum study of graphite irradiated by swift heavy ions
	Charles, Ewing Rodney 1; Zeng Jian 2,3,4; Yao Hui-Jun2 ; Duan Jing-Lai2 ; Hou Ming-Dong 2; Sun You-Mei2 ; Zhai Peng-Fei2 ; Liu Jie2
刊名	CHINESE PHYSICS B
	2014-12-01
卷号	23
关键词	Raman Spectroscopy Swift Heavy Ions Highly Oriented Pyrolytic Graphite Strain Ion Velocity Effect
ISSN号	1674-1056
DOI	10.1088/1674-1056/23/12/126105
文献子类	Article
英文摘要	Highly oriented pyrolytic graphites are irradiated with 40.5-MeV and 67.7-MeV Sn-112-ions in a wide range of fluences: 1 x 10(11) ions/cm(2)-1 x 10(14) ions/cm(2). Raman spectra in the region between 1200 cm(-1) and 3500 cm(-1) show that the disorder induced by Sn-ions increases with ion fluence increasing. However, for the same fluence, the amount of disorder is greater for 40.5-MeV Sn-ions than that observed for 67.7-MeV Sn-ions, even though the latter has a slightly higher value for electronic energy loss. This is explained by the ion velocity effect. Importantly, similar to 3-cm(-1) frequency shift toward lower wavenumber for the D band and similar to 6-cm(-1) shift toward lower wavenumber for the 2D band are observed at a fluence of 1 x 10(14) ions/cm(2), which is consistent with the scenario of radiation-induced strain. The strain formation is interpreted in the context of inelastic thermal spike model, and the change of the 2D band shape at high ion fluence is explained by the accumulation of stacking faults of the graphene layers activated by radiation-induced strain around ion tracks. Moreover, the hexagonal structure around the ion tracks is observed by scanning tunneling microscopy, which confirms that the strains near the ion tracks locally cause electronic decoupling of neighboring graphene layers.
资助项目	National Natural Science Foundation of China[11179003] ; National Natural Science Foundation of China[10975164] ; National Natural Science Foundation of China[10805062] ; National Natural Science Foundation of China[11005134]
WOS关键词	TUNNELING-MICROSCOPY IMAGES ; SPECTROSCOPY ; GRAPHENE ; CARBON ; TRACKS
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000346698000058
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/49441]
专题	近代物理研究所_材料研究中心
通讯作者	Liu Jie
作者单位	1.Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Charles, Ewing Rodney,Zeng Jian,Yao Hui-Jun,et al. Raman spectrum study of graphite irradiated by swift heavy ions[J]. CHINESE PHYSICS B,2014,23.
APA	Charles, Ewing Rodney.,Zeng Jian.,Yao Hui-Jun.,Duan Jing-Lai.,Hou Ming-Dong.,...&Liu Jie.(2014).Raman spectrum study of graphite irradiated by swift heavy ions.CHINESE PHYSICS B,23.
MLA	Charles, Ewing Rodney,et al."Raman spectrum study of graphite irradiated by swift heavy ions".CHINESE PHYSICS B 23(2014).