Fusion and fission of catanionic bilayers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Bruno F B Silva (Autor) Outra; Eduardo F Marques (Autor) FCUP; Ulf Olsson (Autor) Outra

Revista

Título: Soft Matter

Vol. 7 Nº 1

Páginas: 1686-1689

ISSN: 1744-683X

Editora: Royal Society of Chemistry

Indexação

ISI Web of Knowledge - 6 Citações

Scopus - 6 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia dos materiais

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4