Voltage‐dependent scanning tunneling microscopy images of liquid crystals on graphite
作者:
W. Mizutani,
M. Shigeno,
M. Ono,
K. Kajimura,
期刊:
Applied Physics Letters
(AIP Available online 1990)
卷期:
Volume 56,
issue 20
页码: 1974-1976
ISSN:0003-6951
年代: 1990
DOI:10.1063/1.103015
出版商: AIP
数据来源: AIP
摘要:
Voltage‐dependent images of liquid crystals on graphite were observed in air by scanning tunneling microscopy (STM). Molecular rows of liquid crystals and the atomic pattern of the graphite substrate were imaged with high (above 1 V) and low (below 0.1 V) bias voltages, respectively. Patterns of molecules, grain boundaries, and distinguishable defects of the liquid crystal arrangement were reproduced even after imaging the substrate in the same area. This indicates that the graphite lattice can be seen by STM without touching or disturbing the adsorbed molecules on it. A resonant tunneling model is proposed to explain the phenomenon.
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