Surface micellization patterns of quaternary ammonium surfactants on mica

Heather N. Patrick, Gregory G. Warr, Srinivas Manne, Ilhan A. Aksay

Research output: Contribution to journalArticlepeer-review

160 Scopus citations

Abstract

The microscopic equilibrium structures of adsorbed films of quaternary ammonium surfactants on mica have been investigated by noncontact atomic force microscopy imaging as a function of alkyl chain length and headgroup structure. Spherical and cylindrical surface micelles were observed; these were found to be related to bulk solution self-assembly and the surfactant packing parameter, v/aolc. Shape transitions in the surface aggregates were observed on changing the counterion between chloride, bromide, and salicylate.

Original languageEnglish (US)
Pages (from-to)1685-1692
Number of pages8
JournalLangmuir
Volume15
Issue number5
StatePublished - Dec 1 1999

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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