Phys. Rev. Lett. 95, 038304 (2005) [4 pages]

Anisotropy of Sheared Carbon-Nanotube Suspensions

Abstract

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D. Fry¹, B. Langhorst¹, H. Kim², E. Grulke³, H. Wang⁴, and Erik K. Hobbie^1,*
¹National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
²Department of Chemistry, Kyunghee University, Yongin, Kyungkido, 449-701, Korea
³Department of Chemical Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
⁴Department of Materials Science and Engineering, Michigan Technological University, Houghton, Michigan 49931, USA

Received 21 July 2004; published 15 July 2005

We measure the anisotropy of sheared carbon-nanotube suspensions for a broad range of concentration, aspect ratio, and strain rate using a variety of methods. Our measurements highlight the importance of excluded-volume interactions in the semidilute regime, with scaling in terms of a dimensionless shear rate. Our results also suggest that such interactions might be exploited to fractionate carbon nanotubes by length in simple shear flow.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.95.038304

DOI:

10.1103/PhysRevLett.95.038304

PACS:

82.70.−y, 47.55.Kf, 61.46.+w

^*Electronic address: erik.hobbie@nist.gov

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Phys. Rev. Lett. 95, 038304 (2005) [4 pages]

Anisotropy of Sheared Carbon-Nanotube Suspensions