Pore-Size-Dependent Orientational Dynamics of a Liquid Crystal Confined in a Porous Glass

G. Schwalb and F. W. Deeg
Phys. Rev. Lett. 74, 1383 – Published 20 February 1995
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Abstract

Time-resolved transient grating optical Kerr effect experiments were used to investigate the collective reorientational dynamics of pentylcyanobiphenyl embedded in the nanometer-length-scale pores of silica glasses. Measurements in the bulk pretransitional temperature range show a drastic decrease of the relaxation time of the order-parameter fluctuations compared to the bulk with a pronounced pore-size dependence. A Landau model based on independent pore segments can explain the pore-size dependence, but cannot satisfactorily reproduce the observed nonexponentiality of the decays.

  • Received 28 September 1994

DOI:https://doi.org/10.1103/PhysRevLett.74.1383

©1995 American Physical Society

Authors & Affiliations

G. Schwalb and F. W. Deeg

  • Institut für Physikalische Chemie, Universität München, 80333 München, Germany

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Vol. 74, Iss. 8 — 20 February 1995

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