Skip to main content
SpringerLink
Log in

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

  • Published:
Applied Physics B Aims and scope Submit manuscript

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.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Author information

Authors and Affiliations

  1. International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India, , , , , , IN

    N.A. George, C.P.G. Vallabhan, V.P.N. Nampoori & P. Radhakrishnan

  2. Physics Department, College of Science, Sultan Qaboos University, P.O. Box 36, Postal Code 123, Muscat, Oman, , , , , , OM

    A.K. George

Authors
  1. N.A. George
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. C.P.G. Vallabhan
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. V.P.N. Nampoori
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. A.K. George
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. P. Radhakrishnan
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Received: 28 March 2001 / Revised version: 8 June 2001 / Published online: 18 July 2001

Rights and permissions

Reprints and permissions

About this article

Cite this article

George, N., Vallabhan, C., Nampoori, V. et al. Use of an open photoacoustic cell for the thermal characterisation of liquid crystals . Appl Phys B 73, 145–149 (2001). https://doi.org/10.1007/s003400100622

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1007/s003400100622

Search

Navigation