STUDIES OF MOLECULAR ALIGNMENTS OF MONOLAYERS DEPOSITED BY A CHEMICAL ADSORPTION TECHNIQUE

Molecular alignments of monolayers of omega-nonadecenyltrichlorosilane (V-NTS) deposited on SiO2/Al/glass or SiO2/ITO/glass substrates by a chemical adsorption (CA) technique in a nonaqueous solvent containing V-NTS has been investigated by using IR spectroscopy, electron spectroscopy for chemical analysis (ESCA), and a technique to evaluate the degree of alignment of liquid crystals along the monolayers. By use of both ESCA and the technique, an alignment angle of the molecules in the monolayers deposited by the CA technique can be determined. Although the tilt angle of the V-NTS molecules in the monolayer deposited at room temperature was not determined, that at 80-degrees-C was about 32-degrees. The molecular density or the molecular alignment of the monolayers can be controlled by the temperature of the CA condition. The evaluation technique using the alignment of liquid crystals is useful to investigate the molecular alignment in the monolayers. By use of the CA technique, highly ordered monolayers as an alignment film for the liquid crystals may also be obtained easily without rubbing.