Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy

doi:10.1088/1674-1056/24/7/077804

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77804-077804.doi: 10.1088/1674-1056/24/7/077804

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy

鲁妍, 张昕, 吴江滨, 李晓莉, 厉巧巧, 谭平恒

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

收稿日期:2015-01-10 修回日期:2015-02-06 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11225421, 11474277, and 11434010).

Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy

Lu Yan (鲁妍), Zhang Xin (张昕), Wu Jiang-Bin (吴江滨), Li Xiao-Li (李晓莉), Li Qiao-Qiao (厉巧巧), Tan Ping-Heng (谭平恒)

State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China

Received:2015-01-10 Revised:2015-02-06 Online:2015-07-05 Published:2015-07-05
Contact: Tan Ping-Heng E-mail:phtan@semi.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11225421, 11474277, and 11434010).

摘要/Abstract

摘要：

When ultra-thin graphite intercalation compounds (GICs) are deposited on the SiO₂/Si substrate, it is found that their colors are dependent on the thickness of GIC flakes. The sample colors of ultrathin GIC flakes can no longer provide qualitative information on the stage index. Here, multi-wavelength Raman spectroscopy is thus applied to study the doping inhomogeneity and staging of ultra-thin GICs by FeCl₃ intercalation. The G band intensity of stage-1 GIC flakes is strongly enhanced by 532-nm laser excitation, while that of stage-2 and stage-3 flakes exhibits strong intensity enhancement for 785-nm laser excitation. The near-infrared lasers are suggested to probe the doping inhomogeneity and staging of ultra-thin GIC flakes.

关键词: ultra-thin graphite intercalation compounds, Raman spectroscopy, intensity enhancement, doping inhomogeneity

Abstract:

Key words: ultra-thin graphite intercalation compounds, Raman spectroscopy, intensity enhancement, doping inhomogeneity

中图分类号: (Optical properties of graphene)

78.67.Wj

73.22.Pr (Electronic structure of graphene) 81.05.ue (Graphene) 78.30.-j (Infrared and Raman spectra)

鲁妍, 张昕, 吴江滨, 李晓莉, 厉巧巧, 谭平恒. Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy[J]. 中国物理B, 2015, 24(7): 77804-077804.

Lu Yan (鲁妍), Zhang Xin (张昕), Wu Jiang-Bin (吴江滨), Li Xiao-Li (李晓莉), Li Qiao-Qiao (厉巧巧), Tan Ping-Heng (谭平恒). Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy[J]. Chin. Phys. B, 2015, 24(7): 77804-077804.

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Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy

Doping inhomogeneity and staging of ultra-thin graphite intercalation compound flakes probed by visible and near-infrared Raman spectroscopy

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