The University of Southampton
University of Southampton Institutional Repository

The determination of molecular parameters from dielectric measurements on nematic liquid crystals

Record type: Article

bThe physical properties of liquid crystal phases (mesophases) depend in a very sensitive manner on the structure of the constituent liquid crystal-forming molecules (mesogens). Thus a small change in molecular structure can result in a dramatic change in the corresponding liquid crystal properties. The dielectric responses of materials reflect the electric properties of molecules, and so analysis of dielectric measurements on liquid crystals in terms of molecular properties should lead to the development of structure/property relationships for such mesophases. This paper explores the problems of determining molecular parameters from dielectric measurements on nematic liquid crystals. Specifically, the difficulties in defining the internal electric field and knowing the value of the order parameter are addressed. Experimental results on a range of liquid crystals show that short range correlations are important in determining both the dielectric and optical response of nematic liquid crystals. It is concluded therefore that more sophisticated molecular theories, which take account of molecular shape and volume, need to be developed before reliable structure/property relationships can be established for liquid crystals.

Full text not available from this repository.

Citation

Dunmur, D.A. (2005) The determination of molecular parameters from dielectric measurements on nematic liquid crystals Liquid Crystals, 32, (11-12), pp. 1379-1387. (doi:10.1080/02678290500124684).

More information

Published date: 2005
Keywords: dipole association, light-scattering, relaxation, theorie, mesogens, systems, solvent, phase, field

Identifiers

Local EPrints ID: 44426
URI: http://eprints.soton.ac.uk/id/eprint/44426
ISSN: 1358-314X
PURE UUID: 1c520f57-c887-4ca8-ab37-06a8c3038764

Catalogue record

Date deposited: 01 Mar 2007
Last modified: 17 Jul 2017 15:14

Export record

Altmetrics

Contributors

Author: D.A. Dunmur

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×