Phase behavior of the liquid crystal 8CB in a silica aerogel
- 3 August 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (5) , 788-791
- https://doi.org/10.1103/physrevlett.69.788
Abstract
Light scattering and precision calorimetry show that the nematic ordering of octylcyanobiphenyl (8CB) filling the connected network of pores of a silica aerogel does not occur via the first-order phase transition characteristic of the bulk. Rather, ordering is continuous with an orientational correlation length never increasing beyond the aerogel pore size. The heat-capacity anomly of the second-order nematic–smectic-A phase transition seen in the bulk is absent or greatly broadened in the aerogel.Keywords
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