1991•Molecular crystals and liquid crystalsRequires access

Observation of Liquid Crystal Molecule on Graphite by Scanning Tunneling Microscopy

Masatsugu Shigeno, Manabu Ohmi, Mitsuru Suginoya, Wataru Mizutani

Abstract

Molecules of liquid crystals(LCs) adsorbed on highly-oriented pyrolytic graphite(HOPG) were imaged by scanning tunneling microscopy(STM). Planar layer structures induced by the HOPG surface were obtained. Molecular packing models for the STM images are introduced with the aid of a molecular orbital calculation. Also we discuss the rearrangement of the LC alignment during the continuous STM measurement.

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Key concepts: Scanning tunneling microscope, Highly oriented pyrolytic graphite, Graphite, Liquid crystal, Molecule, Planar, Pyrolytic carbon, Materials science