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Nematic anchoring on carbon nanotubes

Appl. Phys. Lett. 95, 173113 (2009); doi:10.1063/1.3256013

Published 29 October 2009

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Rajratan Basu and Germano S. Iannacchione
Department of Physics, Order-Disorder Phenomena Laboratory, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, USA
A dilute suspension of carbon nanotubes (CNTs) in a nematic liquid crystal (LC) does not disturb the LC director. Due to a strong LC-CNT anchoring energy and structural symmetry matching, CNT long axis follows the director field, possessing enhanced dielectric anisotropy of the LC media. This strong anchoring energy stabilizes local pseudonematic domains, resulting in nonzero dielectric anisotropy in the isotropic phase. These anisotropic domains respond to external electric fields and show intrinsic frequency response. The presence of these domains makes the isotropic phase electric field-responsive, giving rise to a large dielectric hysteresis effect. ©2009 American Institute of Physics
History: Received 5 August 2009; accepted 7 October 2009; published 29 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/173113/1
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KEYWORDS and PACS

Keywords
PACS
  • 61.30.Gd
    Orientational order of liquid crystals in electric and magnetic fields
  • 61.30.Cz
    Molecular and microscopic models and theories of liquid crystal structure
  • 77.80.Dj
    Ferroelectric domain structure; hysteresis
  • 82.70.Kj
    Emulsions and suspensions
  • 61.30.Eb
    Experimental determinations of smectic, nematic, cholesteric, and other structures
  • YEAR: 2009

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ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (20)
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