Effect of Acid Treatment on the Structure and Electrical Properties of Nitrogen-Doped Multiwalled Carbon Nanotubes

Burch, Hilary J. and Brown, Elisabetta and Contera, Sonia Antoranz and Toledo, Nashville C. and Cox, D. C. and Grobert, Nicole and Hao, Ling and Ryan, J. F. and Davies, Julia A. (2008) Effect of Acid Treatment on the Structure and Electrical Properties of Nitrogen-Doped Multiwalled Carbon Nanotubes. The Journal of Physical Chemistry C, 112 (6). pp. 1908-1912. ISSN 1932-7447

Full content URL: http://doi.org/10.1021/jp076875i

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Item Type:Article
Item Status:Live Archive

Abstract

Nitrogen-doped multiwalled carbon nanotubes (CNx MWNTs) have been cut to an average length of �1 ím
by room-temperature acid treatment. Imaging of the surface morphology of the CNx MWNTs (x ) 2-5%)
after sonication in acid or in ethanol (as a control) allowed the relationship between surface structure and
acid cutting to be characterized. The effect of the acid treatment on the electrical conductance of the CNx
MWNTs was also determined. The conductance of acid-treated CNx MWNTs was found to vary significantly
within the sample and to be lower than the value of 1.0 G0 observed for as-produced CNx MWNTs. The
G-V curves reported for acid-treated CNx MWNTs had an average slope of 0.19 G0/V, which is significantly
smaller than the average of 0.70 G0/V measured for as-produced CNx MWNTs. Acid-treated CNx MWNTs
exhibited a more rapid electrical breakdown with larger current steps, indicating the breakdown of several
MWNT layers simultaneously.

Additional Information:The final published version of this article can be accessed online at https://pubs.acs.org/doi/abs/10.1021/jp076875i
Keywords:Carbon nanotube, Acid treatment, Doping
Subjects:F Physical Sciences > F310 Applied Physics
Divisions:College of Science > School of Chemistry
ID Code:33721
Deposited On:17 Oct 2018 08:24

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