Fusion and fission of catanionic bilayers

• Type: Article in International Scientific Journal
• Date: 2011

Authors

Bruno F B Silva (Author) Other; Eduardo F Marques (Author) FCUP; Ulf Olsson (Author) Other

Journal

Title: Soft Matter

Vol. 7 No. 1

Pages: 1686-1689

ISSN: 1744-683X

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 6 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

Other information

Authenticus ID: P-002-XSS

DOI: 10.1039/c0sm01269f

Abstract (EN): We herein report the reversible formation of a planar lamellar phase as an intermediate structure in a vesicle-micelle transition induced by temperature, for a salt-free catanionic surfactant-water system. Turbidity, small-angle neutron scattering, dynamic light scattering and microscopy data altogether demonstrate that the vesicles formed by hexadecyltrimethylammonium octylsulfonate (TA(16)So(8)) in water fuse at high temperature into planar lamellae before transforming into elongated micelles. On cooling the micelles first nucleate into lamellae, and only then vesicles appear through lamellae fission. This behavior is both intriguing and counter-intuitive, since a monotonous dependence of the spontaneous curvature of the surfactant film on temperature should be expected.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4