Calorimetric study of phase transitions in confined liquid crystals

Germano S. Iannacchione and Daniele Finotello
Phys. Rev. Lett. 69, 2094 – Published 5 October 1992
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Abstract

Using an ac calorimetry technique we measured the specific heat at the nematic-isotropic, smectic-A–nematic, and smectic-A–isotropic phase transitions, for the alkylcyanobiphenyl liquid crystal nCB series confined to the 0.2-μm-diam pores of Anopore membranes. Studies were also performed as a function of nematic director alignment within the pores. Novel effects regarding specific-heat amplitudes, transition-temperature shifts, and broadening and rounding of phase transitions are found. They are strongly dependent on the director orientation and on the order of the phase transition.

  • Received 1 June 1992

DOI:https://doi.org/10.1103/PhysRevLett.69.2094

©1992 American Physical Society

Authors & Affiliations

Germano S. Iannacchione and Daniele Finotello

  • Department of Physics and Liquid Crystal Institute, Kent State University, Kent, Ohio 44242

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Issue

Vol. 69, Iss. 14 — 5 October 1992

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