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Journal of Nanomaterials
Volume 2012 (2012), Article ID 272960, 8 pages
http://dx.doi.org/10.1155/2012/272960
Research Article

Dry-Transfer of Aligned Multiwalled Carbon Nanotubes for Flexible Transparent Thin Films

1Electrical Engineering Division, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK
2Nokia Research Centre, Broers Building, 21 JJ Thomson Avenue, Cambridge CB3 0FA, UK
3Display Research Centre, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China
4AIXTRON Ltd., Anderson Road, Swavesey CB24 4FQ, UK
5Department of Information Display, Kyung Hee University, Seoul 130-701, Republic of Korea

Received 14 October 2011; Accepted 26 December 2011

Academic Editor: Teng Li

Copyright © 2012 Matthew Cole et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Herein we present an inexpensive facile wet-chemistry-free approach to the transfer of chemical vapour-deposited multiwalled carbon nanotubes to flexible transparent polymer substrates in a single-step process. By controlling the nanotube length, we demonstrate accurate control over the electrical conductivity and optical transparency of the transferred thin films. Uniaxial strains of up to 140% induced only minor reductions in sample conductivity, opening up a number of applications in stretchable electronics. Nanotube alignment offers enhanced functionality for applications such as polarisation selective electrodes and flexible supercapacitor substrates. A capacitance of 17 F/g was determined for supercapacitors fabricated from the reported dry-transferred MWCNTs with the corresponding cyclic voltagrams showing a clear dependence on nanotube length.