Mitsuru Suginoya

Observation of Liquid Crystal Molecule on Graphite by Scanning Tunneling Microscopy

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.

Observation of liquid crystals on graphite by scanning tunneling microscopy

Molecules of liquid crystals adsorbed on graphite were observed by scanning tunneling microscopy (STM). Liquid crystals of both smectic and nematic phases provided periodic STM images of 3-nm-spacing lines, seemingly composed of molecules with their axes vertical to the line. Detailed investigation of the images revealed that several different patterns existed in smectic liquid crystal. On the other hand, nematic liquid crystal exhibited one reproducible pattern. Monolayer, multilayer, and dimer-based molecular arrangements are discussed. Models for the molecular arrangement of the nematic liquid crystal are proposed.

Film Formation Mechanism of Polymer and Pigment Co‐electrodeposition Applied to Thin Microcolor Filter Fabrication

Anodic electrodeposition (ED) of a polymer and an organic pigment on an indium tin oxide (ITO) transparent electrode has been investigated for fabrication of a thin microcolor filter applied to full color liquid crystal displays (LCDs). The waterbone polymer and the pigment are coagulated at the surface of ITO electrodes under the influence of protons, which are generated with electrolytic decomposition of water. The galvanostatic study confirms that the critical proton concentration, C* H+ , is necessary for starting electrodisposition and is influenced by amine concentration in an electrode-position bath