Gas sensing improvement of carbon nanotubes by NH4OH–flash treatment: a nondestructive purification technique

Hsin-Fu Kuo; Der-Hsien Lien; Wen-Kuang Hsu; Nyan-Hwa Tai; Shih-Chin Chang

doi:10.1039/B710000K

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Gas sensing improvement of carbon nanotubes by NH₄OH–flash treatment: a nondestructive purification technique†

Hsin-Fu Kuo,^a Der-Hsien Lien,^a Wen-Kuang Hsu,*^a Nyan-Hwa Tai^a and Shih-Chin Chang^a

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* Corresponding authors

^a Department of Materials Science and Engineering, National Tsing Hua University, 101, Section 2 Kuang Fu Road, Hsinchu, Taiwan
E-mail: wkhsu@mx.nthu.edu.tw
Fax: +886-3-5722366
Tel: +886-3-5715131-35399

Abstract

Surface carbonaceous impurities are removed from carbon nanotubes by NH₄OH–flash treatment and microscope analyses reveal that the carbon walls retain integrity and the tube resistance is reduced by 17% of the initial value. Clean tubes exhibit a significant improvement on gas sensitivity and O₂ adsorption–desorption becomes reversible.

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Supplementary files

SEM images, EDX profiles and additional spectroscopic data of SWNT film before and after NH ₄OH–flash treatment. PDF (775K)

Article information

DOI: https://doi.org/10.1039/B710000K
Article type: Communication
Submitted: 02 Jul 2007
Accepted: 23 Jul 2007
First published: 02 Aug 2007

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J. Mater. Chem., 2007,17, 3581-3584

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Gas sensing improvement of carbon nanotubes by NH₄OH–flash treatment: a nondestructive purification technique

H. Kuo, D. Lien, W. Hsu, N. Tai and S. Chang, J. Mater. Chem., 2007, 17, 3581 DOI: 10.1039/B710000K

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Journal of Materials Chemistry