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Title: High temperature Raman spectroscopy studies of carbon nanowalls
Authors: Ni, Z.H.
Fan, H.M. 
Fan, X.F.
Wang, H.M.
Zheng, Z.
Feng, Y.P. 
Wu, Y.H. 
Shen, Z.X.
Keywords: Carbon nanowalls
Defect-induced D mode
High temperature
Raman spectroscopy
Surface amorphous carbon
Issue Date: Nov-2007
Citation: Ni, Z.H., Fan, H.M., Fan, X.F., Wang, H.M., Zheng, Z., Feng, Y.P., Wu, Y.H., Shen, Z.X. (2007-11). High temperature Raman spectroscopy studies of carbon nanowalls. Journal of Raman Spectroscopy 38 (11) : 1449-1453. ScholarBank@NUS Repository.
Abstract: High temperature Raman experiments were carried out on carbon nanowalls (CNWs). The intensity of the defect-induced D mode decreased significantly after the sample was heated in air ambient. The Raman intensity ratio of D mode and G mode, I D/I G, changed from 2.3 at room temperature to 1.95 after the sample was heated to 600°C. This change was attributed to the removal of surface amorphous carbon by oxidation. In contrast to I D/I G, the intensity ratio of the D′ mode and the G mode, I D′/I G, did not change much after heating, indicating that the surface amorphous carbon and surface impurity do not contribute as much to the intensity of the D′ mode. The dominant contributor to the D′ mode could be the intrinsic defects. Copyright © 2007 John Wiley & Sons, Ltd.
Source Title: Journal of Raman Spectroscopy
ISSN: 03770486
DOI: 10.1002/jrs.1793
Appears in Collections:Staff Publications

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