Nematic-smectic-A phase transition in ultrathin films of polymeric liquid crystal studied by x-ray reflectivity

I. Entin; R. Goffer; D. Davidov; I. Hersht

doi:10.1103/PhysRevB.47.8265

Nematic-smectic-A phase transition in ultrathin films of polymeric liquid crystal studied by x-ray reflectivity

I. Entin^*
, R. Goffer
, D. Davidov
, I. Hersht

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The nematic-smectic-A phase transition in thin (100-600 ) films of polymethacrylate liquid-crystal polymer on glass substrates has been studied by means of x-ray reflectivity. In ultrathin films (about 5-7 smectic layers) the phase-transition temperature is several degrees higher than in the bulk or in thicker films. This effect may be attributed to the suppression of thermal fluctuations by the substrate and finite-size effects.

Original language	English
Pages (from-to)	8265-8268
Number of pages	4
Journal	Physical Review B
Volume	47
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.47.8265
State	Published - 1993

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10.1103/PhysRevB.47.8265

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abstract = "The nematic-smectic-A phase transition in thin (100-600 ) films of polymethacrylate liquid-crystal polymer on glass substrates has been studied by means of x-ray reflectivity. In ultrathin films (about 5-7 smectic layers) the phase-transition temperature is several degrees higher than in the bulk or in thicker films. This effect may be attributed to the suppression of thermal fluctuations by the substrate and finite-size effects.",

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AU - Goffer, R.

AU - Davidov, D.

AU - Hersht, I.

PY - 1993

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AB - The nematic-smectic-A phase transition in thin (100-600 ) films of polymethacrylate liquid-crystal polymer on glass substrates has been studied by means of x-ray reflectivity. In ultrathin films (about 5-7 smectic layers) the phase-transition temperature is several degrees higher than in the bulk or in thicker films. This effect may be attributed to the suppression of thermal fluctuations by the substrate and finite-size effects.

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Nematic-smectic-A phase transition in ultrathin films of polymeric liquid crystal studied by x-ray reflectivity

Abstract

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