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Electric field induced ultra-high actuation in a bulk carbon nanotube structure

Gowda, Prarthana and Kumar, Praveen and Tripathi, Rahul and Misra, Abha (2014) Electric field induced ultra-high actuation in a bulk carbon nanotube structure. In: CARBON, 67 . pp. 546-553.

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Official URL: http://dx.doi.org/10.1016/j.carbon.2013.10.027

Abstract

Electric-field induced nonlinear actuation behavior is demonstrated in a bulk nanotube (CNT) structure under ambient conditions. Completely recoverable and non-degradable actuation over several cycles of electric-field is measured in these structures. A symmetric and polarity independent displacement corresponding up to an axial strain of 14% is measured upon application of a low strength electric field of 4.2 kV/m in the axial direction. However, a much lower strain of similar to 1% is measured in the radial (or, transverse) direction. Furthermore, the electric field induced actuation increases by more than a factor of 2 upon impregnating the CNT cellular structure with copper oxide nano-particles. An electrostriction mechanism, based on the electric-field induced polarization of CNT strands, is proposed to account for the reported actuation behavior. (C) 2013 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the PERGAMON-ELSEVIER SCIENCE LTD, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Depositing User: Id for Latest eprints
Date Deposited: 10 Feb 2014 10:15
Last Modified: 10 Feb 2014 10:15
URI: http://eprints.iisc.ac.in/id/eprint/48328

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