Dynamics of vacancy defects in 2-D crystalline monolayers under chiral smectic thin films studied by scanning tunnelling microscopy
作者:
F. STEVENS,
D. J. DYER,
D. M. WALBA,
R. SHAO,
N. A. CLARK,
期刊:
Liquid Crystals
(Taylor Available online 1997)
卷期:
Volume 22,
issue 5
页码: 531-534
ISSN:0267-8292
年代: 1997
DOI:10.1080/026782997208901
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Scanning tunnelling microscopy (STM) can be used to image adsorbed organic molecules in real space and real time. The technique seems especially well suited for imaging 2-D crystalline monolayers formed under liquid crystal films. In addition to observing perfect 2-D crystals, STM provides the ability to observe crystal defects, and to observe how these defects evolve over time. In this study two different vacancy defects in 2-D lamellar monolayers of chiral liquid crystal molecules under bulk smectic films were observed in situ. Both vacancies showed dynamic behaviour and an unexpected transport anisotropy.
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