Abstracto

Phase transition and thermal characterization study of DDAB induced smectic phases

T.N.Govindaiah, H.R.Sreepad

Two or more multi-components systemof Didodecyl dimethyl ammonium bromide (DDAB - widely used in efficient delivery system), cholesteryl nonanoate (CN) and ethylene glycol (EG) exhibits an interesting different liquid crystalline cholesteric and induced smectic phases, such as SmA, SmC and SmB, sequentiallywhen the specimen is cooled fromits isotropic liquid phase. These phases have been characterized by using optical texture studies.