Use of an open photoacoustic cell for the thermal characterisation of liquid crystals

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Use of an open photoacoustic cell for the thermal characterisation of liquid crystals

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dc.contributor.author Girijavallabhan, C P
dc.contributor.author Radhakrishnan, P
dc.contributor.author V P N Nampoori
dc.contributor.author Nibu, A George
dc.contributor.author George, A K
dc.date.accessioned 2010-07-14T10:14:29Z
dc.date.available 2010-07-14T10:14:29Z
dc.date.issued 2001-07-18
dc.identifier.citation International School of Photonics, Cochin University of Science and Technology en_US
dc.identifier.other Appl. Phys. B 73, 145–149 (2001)
dc.identifier.other DOI: 10.1007/s003400100622
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/1834
dc.description.abstract In this paper, we describe the use of an open cell photoacoustic configuration for the evaluation of the thermal effusivity of liquid crystals. The feasibility, precision and reliability of the method are initially established by measuring the thermal effusivities of water and glycerol, for which the effusivity values are known accurately. In order to demonstrate the use of the present method in the thermal characterization of liquid crystals, we have measured the thermal effusivity values in various mesophases of 4-cyano-4 - octyloxybiphenyl (8OCB) and 4-cyano-4 -heptyloxybiphenyl (7OCB) liquid crystals using a variable temperature open photoacoustic cell. A comparison of the measured values for the two liquid crystals shows that the thermal effusivities of 7OCB in the nematic and isotropic phases are slightly less than those of 8OCB in the corresponding phases en_US
dc.language.iso en en_US
dc.publisher Applied Physics B Lasers and Optics en_US
dc.subject open photoacoustic cell en_US
dc.subject thermal characterisation en_US
dc.subject liquid crystals en_US
dc.title Use of an open photoacoustic cell for the thermal characterisation of liquid crystals en_US
dc.type Working Paper en_US


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