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  Home > JCE Print > Journal of Chemical Education > Issues > 1996  > June  >
Laboratory Experiments
A Computer Experiment in Physical Chemistry: Linear Dichroism in Nematic Liquid Crystals
Erhan Demirbas and Robin Devonshire
Sheffield University, Sheffield S3 7HF, UK
Cover
June 1996
Vol. 73 No. 6
p. 586
Abstract
This work describes a computer-assisted laboratory experiment for university level students which measures, quantitatively, the ordering behavior of liquid crystals. A study of the temperature dependence of the linear dichroism of an azo dye in a nematic liquid crystal system was carried out. The results were used to calculate both the reduced temperature and the order parameter of the liquid crystal over a temperature range that included the nematic-isotropic transition temperature. The computer-assisted experiment's results are compared with those of experiments on the same samples conducted manually, and are compared to published values. The results demonstrate the efficiency of the method and its accuracy and reproducibility.
More Information
*  Citation
 Demirbas, Erhan; Devonshire, Robin. J. Chem. Educ. 1996 73 586.
*  Keywords
*  History
 Created:
Last Updated:		 9/23/1999
5/22/2006
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