A fluorescence probe study of the mixed surfactant vesicles

Vesicle can be prepared from aqueous mixtures of simple commercially availa ble, single-tailed cationic and anionic surfactants. In this work, the I-3/ I-1 value, I-e/I-m value, and fluorescence lifetime of pyrene in different system (see the preparation of samples) were determined. The essential affe cting factors in the formation of vesicle can be deduced from the obtained results. It showed that large vesicle must form naturally before sonication in 0.082 M octyltrimethylammonium bromide and sodium laurate pH = 9.2 aque ous solution. While after sonication, only small vesicle exists, which can be proved further through electron microscope.