Surface micellization patterns of quaternary ammonium surfactants on mica

Authors
Patrick, HN Warr, GG Manne, S Aksay, IA
Citation
Hn. Patrick et al., Surface micellization patterns of quaternary ammonium surfactants on mica, LANGMUIR, 15(5), 1999, pp. 1685-1692
Citations number
40
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
LANGMUIR
ISSN journal
07437463 → ACNP
Volume
15
Issue
5
Year of publication
1999
Pages
1685 - 1692
Database
ISI
SICI code
0743-7463(19990302)15:5<1685:SMPOQA>2.0.ZU;2-8
Abstract
The microscopic equilibrium structures of adsorbed films of quaternary ammo nium surfactants on mica have been investigated by noncontact atomic force microscopy imaging as a function of alkyl chain length and headgroup struct ure. Spherical and cylindrical surface micelles were observed; these were f ound to be related to bulk. solution self-assembly and the surfactant packi ng parameter, v/a(0)l(c). Shape transitions in the surface aggregates were observed on changing the counterion between chloride, bromide, and salicyla te.