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Proceedings Paper

Size dependence of critical behavior at smectic-A to nematic transition in random network
Author(s): Huairen Zeng; Gary Qian; Bostjan Zalar; Daniele Finotello
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Paper Abstract

The smectic-A to nematic (AN) transition was studied under confinement as introduced by the randomly interconnected voids of Millipore filters. Using a high resolution calorimetry it was determined that heat capacity peaks evolve from sharp and prominent to broad and small with decreasing void size. The random confinement drives the heat capacity critical exponent from the bulk value towards zero, the 3D-XY model prediction, indicating a confinement-induced decoupling of smectic and nematic order parameters. Preliminary NMR results show that in the largest Millipore size studied, the behavior is similar to bulk's; in smaller voids, there are dramatic differences from bulk that emphasize the dominating role that the fibrous surfaces begin to play.

Paper Details

Date Published: 1 January 1998
PDF: 7 pages
Proc. SPIE 3319, Liquid Crystals: Chemistry and Structure, (1 January 1998); doi: 10.1117/12.301266
Show Author Affiliations
Huairen Zeng, Kent State Univ. (United States)
Gary Qian, Kent State Univ. (United States)
Bostjan Zalar, Kent State Univ. (United States)
Daniele Finotello, Kent State Univ. (United States)

Published in SPIE Proceedings Vol. 3319:
Liquid Crystals: Chemistry and Structure
Marzena Tykarska; Roman S. Dabrowski; Jerzy Zielinski, Editor(s)

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