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Improvement of Carbon Nanotube Films on SiC formed by Surface Decomposition by Hydrogen Peroxide Purification

Published online by Cambridge University Press:  31 January 2011

Takahiro Maruyama ,
Fumiya Nakahama  and
Shigeya Naritsuka
Takahiro Maruyama
Affiliation:
takamaru@ccmfs.meijo-u.ac.jp, Meijo University, Department of Materials Science and Engineering, 1-501 Shiogamaguchi, Nagoya, Aichi, 4688502, Japan, +81-52-838-2386, +81-52-832-1172
Fumiya Nakahama
Affiliation:
takamaru@ccmfs.meijo-u.ac.jp, Meijo University, Department of Materials Science and Engineering, 1-501 Shiogamaguchi, Nagoya, Aichi, 4688502, Japan, +81-52-838-2386, +81-52-832-1172
Shigeya Naritsuka
Affiliation:
takamaru@ccmfs.meijo-u.ac.jp, Meijo University, Department of Materials Science and Engineering, 1-501 Shiogamaguchi, Nagoya, Aichi, 4688502, Japan, +81-52-838-2386, +81-52-832-1172
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Abstract

We studied the effects of annealing in H2O2 on the morphologies and structures of “as grown” high-density, well-aligned multi-walled carbon nanotube (MWNT) films formed by surface decomposition of SiC. After annealing in H2O2 solution at 100°C for 3 h, the G/D ratio increased from 1.44 to 2.33, the FWHM of the G band peak became narrower, and a D′ shoulder peak appeared. Transmission electron microscopy (TEM) revealed that the dispersion of MWNTs in dimethylformamide (DMF) solution was improved, suggesting that film impurities were reduced and that damage to the MWNTs was negligible. After annealing for 9 h, the G/D ratio decreased to 1.57, and exfoliation of some MWNTs was observed. In addition, several functional groups such as carboxylic (-COOH) and hydroxyl (-OH) were formed on the surface of the MWNTs. From these results, we conclude that annealing in H2O2 under proper conditions can effectively purify “as grown” MWNT films formed by surface decomposition of SiC.

Keywords

CnanostructureRaman spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1204: Symposium K – Nanotubes and Related Nanostructures-2009 , 2009 , 1204-K14-40
Copyright
Copyright © Materials Research Society 2010

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