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Proceedings Paper

Electrokinetic elongation and subsequent dispersion of carbon nanotubes in liquid crystal medium
Author(s): Seung Hee Lee; Seok Jin Jeong; Anoop Kumar Srivastava; Miyoung Kim; Eun Mi Jo; Jung Jun Bae; Young Hee Lee
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Paper Abstract

This work reports the elongation and subsequent dispersion of carbon nano tube (CNT) aggregates driven by the electric field in a liquid crystal (LC) medium. Longitudinal and cross sectional views of CNT aggregates were investigated in homogeneously aligned cell driven by in-plane field and homeotropic aligned cell, respectively. CNT aggregates firstly were aligned toward field line by dielectrophoretic torque and secondly they were elongated above a certain threshold field due to interaction between induced dipole moment and electric field. The CNTs aggregates elongated linearly with varying electric fields. The original morphology of the CNT aggregates was restored after the removal of the field. The evidence of a complete restoration indicated that the elasticity of CNT aggregates obeyed Hooke's Law. The elongation was fully reversible only below a certain breakdown field. Above breakdown electric field, CNT aggregates were ruptured and fragmented into small pieces and consequently CNTs got dispersed in LC medium.

Paper Details

Date Published: 4 September 2008
PDF: 6 pages
Proc. SPIE 7037, Carbon Nanotubes and Associated Devices, 70370I (4 September 2008); doi: 10.1117/12.797169
Show Author Affiliations
Seung Hee Lee, Chonbuk National Univ. (South Korea)
Seok Jin Jeong, Chonbuk National Univ. (South Korea)
Anoop Kumar Srivastava, Chonbuk National Univ. (South Korea)
Miyoung Kim, Chonbuk National Univ. (South Korea)
Eun Mi Jo, Chonbuk National Univ. (South Korea)
Jung Jun Bae, Sungkyunkwan Univ. (South Korea)
Young Hee Lee, Sungkyunkwan Univ. (South Korea)

Published in SPIE Proceedings Vol. 7037:
Carbon Nanotubes and Associated Devices
Manijeh Razeghi; Didier Pribat; Young Hee Lee, Editor(s)

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