Fluctuations of bare membranes and their modification on incorporation of polymers having equally spaced anchors

Xuesong Hu, Ralf Biehl, Robert K. Prud'homme, Michael Monkenbusch, Jyotsana Lal

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Membrane undulations of highly ordered bare nonionic surfactant penta(ethyleneglycol) dodecyl ether (C12E5) multilayers were studied by neutron spin echo spectroscopy (NSE). The membrane relaxations profiles were fitted by a stretched exponential law S(q,t) = S(q)exp(Γqt)3/2, where S(q) is the static structure factor and Γq is the relaxation rate. The universal scaling law Γq∼q3 for qd/2π>1, where d is the inter-lamellar spacing was observed. From the dependence of Γq on d as obtained for different surfactant volume fractions, shows that intermembrane contributions are still important at these q values. A model comb-graft polymer with monodisperse Polyethylene glycol (PEG) blocks of 6kg/mol connecting C18 stearylamide hydrophobes, which serve as anchors, was introduced in the lamellar phase at increasing polymer concentration at two membrane volume fraction of 20% and 30% (Langmuir 18 (2002) 6).

Original languageEnglish (US)
Pages (from-to)217-219
Number of pages3
JournalPhysica B: Condensed Matter
Volume350
Issue number4
DOIs
StatePublished - Jul 30 2004

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Keywords

  • Membrane
  • Neutron scattering
  • Polymer

Fingerprint Dive into the research topics of 'Fluctuations of bare membranes and their modification on incorporation of polymers having equally spaced anchors'. Together they form a unique fingerprint.

  • Cite this