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http://hdl.handle.net/2289/5235Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | Giridhar, M.S. | - |
| dc.contributor.author | Suresh, K.A. | - |
| dc.date.accessioned | 2012-08-07T05:14:17Z | - |
| dc.date.available | 2012-08-07T05:14:17Z | - |
| dc.date.issued | 2002-02 | - |
| dc.identifier.citation | European Physical Journal E, 2002, Vol.7, p167 | en |
| dc.identifier.issn | 1292-8941 | - |
| dc.identifier.issn | 1292-895X(Online) | - |
| dc.identifier.uri | http://hdl.handle.net/2289/5235 | - |
| dc.description | Restricted Access | en |
| dc.description.abstract | Although viscoelastic properties of liquid crystals are very important for applications like display technology, there are not many direct techniques to study them. We have used dynamic light scattering to obtain dispersion curves for the twist mode of director fluctuations in a thermotropic cholesteric liquid crystal (cholesteric) mixture, in a wave vector range comparable to the inverse pitch of the cholesteric. In the experiment, light scattered in the vicinity of Bragg reflection is investigated using a hitherto unused scattering geometry where the scattering wave vector q is parallel to the cholesteric helix axis. By fitting the experimental data to a parabolic function of the scattering wave vector, we have determined the twist viscoelastic coefficient k_{22}/γ1. We have studied the temperature dependence of k_{22}/γ1 and found that the viscoelastic coefficient increases rapidly as the cholesteric-to-isotropic transition temperature is approached. | en |
| dc.language.iso | en | en |
| dc.publisher | EDP Sciences | en |
| dc.relation.uri | http://adsabs.harvard.edu/abs/2002EPJE....7..167G | en |
| dc.relation.uri | http://dx.doi.org/10.1140/epje/i20000165 | en |
| dc.rights | 2002 EDP Sciences | en |
| dc.subject | Liquid crystals | en |
| dc.subject | Diffraction and scattering | en |
| dc.title | Dynamic light scattering study of the viscoelastic twist mode in cholesteric liquid crystals | en |
| dc.type | Article | en |
| Appears in Collections: | Research Papers (SCM) | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2002_EuroPhysical JourE_Vol.7_p167.pdf Restricted Access | Restricted Access | 196.38 kB | Adobe PDF | View/Open Request a copy |
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