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Change of DLC Domains by IR Irradiation for a Plastic Columnar Mesophase

ABSTRACT In this study, alignment change of liquid crystal domains induced by infrared irradiation was investigated for a plastic hexagonal columnar mesophase of a liquid crystalline triphenylene derivative. A uniform and anisotropic alignment change of domains was observed when polarized infrared light corresponding to the wavelength of the aromatic C─C stretching absorption band of triphenylene core was irradiated. The results strongly imply that the infrared irradiation is a possible technique for device fabrication by use of plastic columnar mesophase as a liquid crystalline semiconductor.