Temperature and concentration effects on decyltrimethylammonium micelles in water

Karen Edler, Daniel T Bowron

Research output: Contribution to journalArticle

1 Citation (Scopus)
2 Downloads (Pure)

Abstract

Wide-angle neutron scattering experiments combined with Empirical Potential Structural Refinement modelling have been used to study the detailed structure of decyltrimethylammonium bromide (C 10TAB) micelles at two different temperatures; 25°C and 50°C and two concentrations; 0.4 and 0.8 M in water. At higher temperature, the micelles become smaller, and fewer counterions bind to the micelle surfaces, however, the headgroup positions are more ordered, possibly due to crowding in the smaller micelles. At higher concentration, the models suggest the micelles become elongated, although the aggregations numbers are smaller than those at the lower concentration. The smaller micelles found in 0.8 M solutions have more hydrated headgroups and lower counterion binding than the ellipsoidal micelles found in 0.4 M C 10TAB solutions.

Original languageEnglish
Pages (from-to)3389-3397
Number of pages9
JournalMolecular Physics
Volume117
Issue number22
Early online date13 Aug 2019
DOIs
Publication statusPublished - 17 Nov 2019

Keywords

  • micelles
  • struction
  • ion binding
  • wide-angle scattering
  • Empirical potential structure refinement
  • empirical potential structure refinement
  • Micelles
  • structure

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Molecular Biology
  • Biophysics
  • Physical and Theoretical Chemistry

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