Journal article
Field controlled nematic-to-isotropic phase transition in liquid crystal-carbon nanotube composites
Journal of applied physics, Vol.103(6), pp.064314-064314-5
25 Mar 2008
Abstract
A nematic-to-isotropic transition has been observed in suspensions of carbon nanotubes (CNTs) and a cyanobiphenyl-based liquid crystal (LC) confined within an indium tin oxide glass sandwich cell. Upon the application of electric field, CNTs rotate out of plane short-circuiting the electrodes and producing a current flow through the CNTs. The resulting Joule heating leads to a local increase in temperature of the LC-CNT medium. Hence, starting from a metastable nematic phase, a complete transition to the isotropic phase is observed. On removal of the electric field, the transition is reversed with the LC-CNT medium returning to the nematic phase.
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Details
- Title
- Field controlled nematic-to-isotropic phase transition in liquid crystal-carbon nanotube composites
- Creators
- Hemang Shah - Department of Electrical and Computer Engineering, and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAAdam Fontecchio - Department of Electrical and Computer Engineering, and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USADavide Mattia - Department of Electrical and Computer Engineering, and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USAYury Gogotsi - Department of Electrical and Computer Engineering, and A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, Pennsylvania 19104, USA
- Publication Details
- Journal of applied physics, Vol.103(6), pp.064314-064314-5
- Publisher
- American Institute of Physics
- Resource Type
- Journal article
- Academic Unit
- Electrical and Computer Engineering; Materials Science and Engineering
- Identifiers
- 991014969759804721
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