Influence of confinement in controlled-pore glass on the layer spacing of smectic-A liquid crystals

George Cordoyiannis, Aleksander Zidanšek, Gojmir Lahajnar, Zdravko Kutnjak, Heinz Amenitsch, George Nounesis, and Samo Kralj
Phys. Rev. E 79, 051703 – Published 11 May 2009
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  • INTRODUCTION
  • SAMPLES AND EXPERIMENTAL SETUP
  • RESULTS
  • DISCUSSION
  • CONCLUSIONS
  • APPENDICES
    • References

    Abstract

    A detailed x-ray scattering study has been performed in the temperature range of the smectic-A phase for the liquid crystal compounds dodecylcyanobiphenyl (12CB) and octylcyanobiphenyl (8CB) confined in different controlled-pore glasses (CPGs) characterized by their average void radius R. On decreasing the temperature in bulk samples the layer thickness is increasing for 12CB and decreasing for 8CB, respectively. In nontreated CPG samples the layers dilate significantly with respect to the bulk liquid crystal. In order to explain the layer thickness behavior on varying temperature and R, one has to take into account molecular details of the liquid crystalline samples as well as memory effects.

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    • Received 17 December 2008

    DOI:https://doi.org/10.1103/PhysRevE.79.051703

    ©2009 American Physical Society

    Authors & Affiliations

    George Cordoyiannis1,2,*, Aleksander Zidanšek2, Gojmir Lahajnar2, Zdravko Kutnjak2, Heinz Amenitsch3, George Nounesis1, and Samo Kralj2,4

    • 1National Centre for Scientific Research “Demokritos,” 153 10 Aghia Paraskevi, Greece
    • 2Jožef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia
    • 3Institute of Biophysics and Nanosystems Research, Austrian Academy of Sciences, Schmiedlstr. 6, A-8012 Graz, Austria
    • 4Laboratory of Physics of Complex Systems, Faculty of Natural Sciences, University of Maribor, Koroška 160, 2000 Maribor, Slovenia

    • *george.cordoyiannis@fys.kuleuven.be

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    Vol. 79, Iss. 5 — May 2009

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