Anchoring Transition Induced by Gelation in a Liquid Crystal System

Authors

  • R. Bhargavi,

    1. Centre for Soft Matter Research, P.B. No. 1329 Jalahalli, Bangalore 560013 (INDIA), Fax: (+91) 80-28382044
    Search for more papers by this author
  • Geetha G. Nair,

    Corresponding author
    1. Centre for Soft Matter Research, P.B. No. 1329 Jalahalli, Bangalore 560013 (INDIA), Fax: (+91) 80-28382044
    • Centre for Soft Matter Research, P.B. No. 1329 Jalahalli, Bangalore 560013 (INDIA), Fax: (+91) 80-28382044
    Search for more papers by this author
  • S. Krishna Prasad

    Corresponding author
    1. Centre for Soft Matter Research, P.B. No. 1329 Jalahalli, Bangalore 560013 (INDIA), Fax: (+91) 80-28382044
    • Centre for Soft Matter Research, P.B. No. 1329 Jalahalli, Bangalore 560013 (INDIA), Fax: (+91) 80-28382044
    Search for more papers by this author

Abstract

We report a novel type of anchoring transition (ANT) in a liquid crystal driven by the physical gelation of the system. The ANT manifests as anomaly in the thermal behaviour of the dielectric permittivity. Data from X-ray studies suggest that ANT is caused by the ability of the gel fibres to compete with the substrate-driven orientation conditions. It is further found that the molecular reorientation is possible only in cases where the gel is weak, the difference between weak and strong gels being established by rheological measurements.

Ancillary