A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field
Dunn, C. J., Ionescu, D., Kunimatsu, N., Luckhurst, G. R., Orian, L. and Polimeno, A. (2000) A novel magnetohydrodynamic experiment: Step-rotation of a nematic subject to a magnetic field. Journal of Physical Chemistry B, 104, (47), 10989-11000. (doi: 10.1021/jp002073a)
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Official URL: http://pubs.acs.org/cgi-bin/abstract.cgi/jpcbfk/20...
Description/Abstract
We have studied the time-dependent behavior of the director following the step-rotation of a nematic sample subject to a static magnetic field. The director orientation has been monitored using ESR spectroscopy, and we have developed a model-independent analysis of the spectra to yield the distribution function for the director with respect to the magnetic field. This reveals that immediately following the step-rotation the director is uniformly aligned parallel to the field and then adopts a range of orientations before returning to a state of uniform alignment with the director at the step-rotation angle to the field. This unusual behavior of the director is compared with the predictions of nematodynamic theory by employing an exact treatment of the Leslie-Ericksen equations to calculate the time and space dependence of the director orientation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | transient periodic structures, liquid-crystals, reorientation, transition, dynamics, director |
| Related URLs: | http://pubs.acs.org/cgi-bin/ab...2073a.html |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| ePrint ID: | 18944 |
| URI: | http://eprints.soton.ac.uk/id/eprint/18944 |
| Deposited On: | 05 Jan 2006 |
| Last Modified: | 01 Jun 2011 00:28 |
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