The Molecular Arrangement of Polar Organic Molecules by Scanning Tunneling Microscope

Seiji Taki Department of Applied Science, Faculty of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812, JAPAN

Yasuo Takebayashi Department of Applied Science, Faculty of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812, JAPAN

Kazumi Matsushige Department of Applied Science, Faculty of Engineering, Kyushu University, Hakozaki, Higashi-ku, Fukuoka, 812, JAPAN; Department of Electronics, Faculty of Engineering, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, 606, JAPAN

Abstract

The scanning tunneling microscope (STM) was utilized to observe the molecular images of a newly synthesized liquid crystal, 6-(dodecyloxy-phenyl)-3-chloropyridazine (DOPCP), which contains two kinds of electric dipoles directed parallel as well as perpendicular to the molecular axis. The sample adsorbed on the graphite substrate showed the interdigitated double rows structures with a singular repeating unit composed of five molecules. Also, the appearance of several different STM images suggests that the electric interaction induced from the electric dipoles and van der Waals force influences greatly on the structure formation in this polar molecule.

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The Molecular Arrangement of Polar Organic Molecules by Scanning Tunneling Microscope

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