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Science 22 September 1989:
Vol. 245. no. 4924, pp. 1371 - 1374
DOI: 10.1126/science.2781283
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Articles

Science, Vol 245, Issue 4924, 1371-1374
Copyright © 1989 by American Association for the Advancement of Science

articles

Spontaneous vesicle formation in aqueous mixtures of single-tailed surfactants

EW Kaler, AK Murthy, BE Rodriguez, and JA Zasadzinski

Department of Chemical Engineering, University of Washington, Seattle 98195.

Spontaneous, single-walled, equilibrium vesicles can be prepared from aqueous mixtures of simple, commercially available, single-tailed cationic and anionic surfactants. Vesicle size, surface charge, or permeability can be readily adjusted by varying the ratio of anionic to cationic surfactant. Vesicle formation apparently results from the production of anion-cation surfactant pairs that then act as double-tailed zwitterionic surfactants. These vesicles are quite stable in comparison to conventional vesicles prepared by mechanical disruption of insoluble liquid crystalline dispersions.


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