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Research

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Publication details for Professor Michael Petty

Lee, KU, Cho, YH, Petty, MC & Ahn, BT (2009). Electrical conductivity of single-wall carbon nanotube film deposited by electrostatic layer-by-layer assembly with the aid of polyelectrolytes. Carbon 47(2): 475-481.
  • Publication type: Journal Article
  • ISSN/ISBN: 0008-6223

Author(s) from Durham

Abstract

A single-wall carbon nanotube film was deposited by the sequential
deposition of positively charged single-wall carbon nanotube with poly
diallyldimethylammonium and negatively charged single-wall nanotube
with poly sodium 4-styrenesulfonate. The sequential deposition was
repeated 10 times and Al was used as an electrode to measure the
electrical conductivity of the film. Electrochemical impedance
spectroscopy showed that the film had two semicircles with the
resistances of 300 and 1700 Omega, representing single-wall carbon
nanotube and polyelectrolyte parts, respectively. The conductivity of
the film was enhanced when the water molecules were removed by heat
treatment. The analysis of the J-V characteristics indicates that the
mechanism of the charge transfer through the single-wall carbon
nanotube-polyelectrolyte film is quantum mechanical tunneling. (C) 2008
Elsevier Ltd. All rights reserved.