Investigation of the interfacial order of nematic liquid crystal on photopolymer coated conducting glass substrates with a scanning tunneling microscope
作者:
S. C. Jain,
K. Rajesh,
S. B. Samanta,
A. V. Narlikar,
期刊:
Applied Physics Letters
(AIP Available online 1995)
卷期:
Volume 67,
issue 11
页码: 1527-1529
ISSN:0003-6951
年代: 1995
DOI:10.1063/1.114481
出版商: AIP
数据来源: AIP
摘要:
High resolution images of individual molecules of the liquid crystalline material adsorbed on a photopolymer treated transparent conducting (indium oxide coated) glass plate have been obtained with a scanning tunneling microscope (STM). The ultrathin layer of the photopolymer poly‐vinyl‐4‐methoxy‐cinnamate (PVMC) on the conducting glass plate was deposited by the bulk induced alignment technique reported earlier [S. C. Jain and H.‐S. Kitzerow, Appl. Phys. Lett.64, 2946 (1994)]. The liquid crystal molecules exhibit a positional order, in addition to a high degree of orientational order of the bulk nematic. This surface ordering of the nematic liquid crystal at the polymer interface is quite different from the ordering observed on graphite and molybdenum disulphide substrates. A small ensemble of molecules show antiparallel ordering of the cyano‐phenyl‐cyclo‐hexane molecules in agreement with the calculations of Schadtetal. [Liq. Cryst.5, 293 (1989)]. ©1995 American Institute of Physics.
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