Unusual thickness-dependent heat-capacity anomaly in free-standing hexatic liquid-crystal films

C. Y. Chao; T. C. Pan; C. R. Lo; M. Veum; C. C. Huang; V. Surendranath; J. T. Ho

doi:10.1080/15421400490440282

Unusual thickness-dependent heat-capacity anomaly in free-standing hexatic liquid-crystal films

C. Y. Chao, T. C. Pan, C. R. Lo, M. Veum, C. C. Huang, V. Surendranath, J. T. Ho

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

High-resolution heat-capacity and optical-reflectivity measurements have been conducted near the smectic-A to hexatic-B transition in thin free-standing films of the liquid-crystal compound 64COOBC. We find an unexpected dependence on film thickness of the integrated magnitude of the heat-capacity anomalies as the films undergo layer-by-layer transitions. We measure the penetration depths of the ordering from the surface and next-to-surface layers which are pertinent to the highly correlated thermal behavior.

Original language	English (US)
Pages (from-to)	385/[1995]-392/[2002]
Journal	Molecular crystals and liquid crystals
Volume	412
DOIs	https://doi.org/10.1080/15421400490440282
State	Published - 2004
Event	Proceedings of the 19th International Liquid Crystal Conference, ILCC2002 - Edinburgh, United Kingdom Duration: Jun 30 2002 → Jul 5 2002

Bibliographical note

Funding Information:
One of us (C. Y. C.) would like to thank Prof. Jan Thoen for helpful discussion, and W. B. Shu and P. J. Wu for technical improvement in our optical image analysis and scanning system. The work was supported by National Science Council, Taiwan, Republic of China, under Grant Nos. NSC 90–2112-M-008–004 and NSC 91–2112-M-008–048.

Keywords

Heat capacity
Liquid-crystal thin films
Optical reflectivity

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title = "Unusual thickness-dependent heat-capacity anomaly in free-standing hexatic liquid-crystal films",

abstract = "High-resolution heat-capacity and optical-reflectivity measurements have been conducted near the smectic-A to hexatic-B transition in thin free-standing films of the liquid-crystal compound 64COOBC. We find an unexpected dependence on film thickness of the integrated magnitude of the heat-capacity anomalies as the films undergo layer-by-layer transitions. We measure the penetration depths of the ordering from the surface and next-to-surface layers which are pertinent to the highly correlated thermal behavior.",

keywords = "Heat capacity, Liquid-crystal thin films, Optical reflectivity",

author = "Chao, {C. Y.} and Pan, {T. C.} and Lo, {C. R.} and M. Veum and Huang, {C. C.} and V. Surendranath and Ho, {J. T.}",

note = "Funding Information: One of us (C. Y. C.) would like to thank Prof. Jan Thoen for helpful discussion, and W. B. Shu and P. J. Wu for technical improvement in our optical image analysis and scanning system. The work was supported by National Science Council, Taiwan, Republic of China, under Grant Nos. NSC 90–2112-M-008–004 and NSC 91–2112-M-008–048.; Proceedings of the 19th International Liquid Crystal Conference, ILCC2002 ; Conference date: 30-06-2002 Through 05-07-2002",

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TY - JOUR

T1 - Unusual thickness-dependent heat-capacity anomaly in free-standing hexatic liquid-crystal films

AU - Chao, C. Y.

AU - Pan, T. C.

AU - Lo, C. R.

AU - Veum, M.

AU - Huang, C. C.

AU - Surendranath, V.

AU - Ho, J. T.

N1 - Funding Information: One of us (C. Y. C.) would like to thank Prof. Jan Thoen for helpful discussion, and W. B. Shu and P. J. Wu for technical improvement in our optical image analysis and scanning system. The work was supported by National Science Council, Taiwan, Republic of China, under Grant Nos. NSC 90–2112-M-008–004 and NSC 91–2112-M-008–048.

PY - 2004

Y1 - 2004

N2 - High-resolution heat-capacity and optical-reflectivity measurements have been conducted near the smectic-A to hexatic-B transition in thin free-standing films of the liquid-crystal compound 64COOBC. We find an unexpected dependence on film thickness of the integrated magnitude of the heat-capacity anomalies as the films undergo layer-by-layer transitions. We measure the penetration depths of the ordering from the surface and next-to-surface layers which are pertinent to the highly correlated thermal behavior.

AB - High-resolution heat-capacity and optical-reflectivity measurements have been conducted near the smectic-A to hexatic-B transition in thin free-standing films of the liquid-crystal compound 64COOBC. We find an unexpected dependence on film thickness of the integrated magnitude of the heat-capacity anomalies as the films undergo layer-by-layer transitions. We measure the penetration depths of the ordering from the surface and next-to-surface layers which are pertinent to the highly correlated thermal behavior.

KW - Heat capacity

KW - Liquid-crystal thin films

KW - Optical reflectivity

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SN - 1542-1406

VL - 412

SP - 385/[1995]-392/[2002]

JO - Molecular crystals and liquid crystals

JF - Molecular crystals and liquid crystals

T2 - Proceedings of the 19th International Liquid Crystal Conference, ILCC2002

Y2 - 30 June 2002 through 5 July 2002

ER -

Unusual thickness-dependent heat-capacity anomaly in free-standing hexatic liquid-crystal films

Abstract

Bibliographical note

Keywords

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