標題: Effects of Gas Composition on Highly Efficient Surface Modification of Multi-Walled Carbon Nanotubes by Cation Treatment
作者: Tseng, Wen-Shou
Tseng, Chyuan-Yow
Kuo, Cheng-Tzu
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Multi-walled carbon nanotubes;Electron cyclotron resonance plasma
公開日期: 1-Mar-2009
摘要: High incident energy hydrogen and/or oxygen cations are generated by electron cyclotron resonance system, and then used to highly efficiently modify multi-walled carbon nanotubes (MWCNTs). The effects of various H(2)/O(2) gas compositions on the modification process are studied. A systematic characterization method utilizing a combination of X-ray photoelectron spectroscopy (XPS), scanning electron microscopy, Raman spectroscopy, and thermogravimetric analysis (TGA) is used to evaluate the effects of various H(2)/O(2) gas compositions on MWCNT functionalization. The Raman results show that the I (D)/I (G) ratio is directly affected by H(2) concentration in gas mixture, and the treatment applying a H(2)/O(2) gas mixture with ratio of 40/10 (sccm/sccm) can yield the nanotubes with the highest I (D)/I (G) ratio (1.27). The XPS results suggest that the gas mixture with ratio of 25/25 (sccm/sccm) is most effective in introducing oxygen-containing functional groups and reducing amorphous carbon. The TGA suggests that the structural change of the treated nanotubes is marginal by this method with any gas condition.
URI: http://dx.doi.org/10.1007/s11671-008-9231-4
http://hdl.handle.net/11536/7600
ISSN: 1931-7573
DOI: 10.1007/s11671-008-9231-4
期刊: NANOSCALE RESEARCH LETTERS
Volume: 4
Issue: 3
起始頁: 234
結束頁: 239
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