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Journal of Nanotechnology
Volume 2014 (2014), Article ID 349453, 11 pages
http://dx.doi.org/10.1155/2014/349453
Research Article

Peeling of Long, Straight Carbon Nanotubes from Surfaces

1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA
2Advanced Materials and Processing Branch, NASA Langley Research Center, Hampton, VA 23681-2199, USA
3George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0405, USA

Received 15 July 2013; Accepted 20 December 2013; Published 23 February 2014

Academic Editor: Bobby G. Sumpter

Copyright © 2014 Kane M. Barker 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

The adhesion of long, straight, single-walled carbon nanotubes to surfaces is examined using multidimensional force spectroscopy. We observed characteristic signatures in the deflection and frequency response of the cantilever indicative of nanotube buckling and slip-stick motion as a result of compression and subsequent adhesion and peeling of the nanotube from the surface. The spring constant and the elastic modulus of the SWNT were estimated from the frequency shifts under tension. Using elastica modeling for postbuckled columns, we have determined the static coefficient of friction for the SWNT on alkanethiol-modified gold surfaces and showed that it varies with the identity of the monolayer terminal group.