Inter-lamellar interactions modulated by addition of guest components

M. Imai, R. Mawatari, K. Nakaya, S. Komura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

We have investigated the effects of a guest component (polymer or spherical colloidal particle) confined between flexible lamellar slits on the inter-lamellar interaction by means of a small-angle X-ray scattering technique and a neutron spin echo technique. The dominant interaction between flexible lamellar membranes without guest components is the Helfrich mechanism. The addition of a neutral polymer into the lamellar phase induces an attractive inter-lamellar interaction and finally destabilizes the lamellar phase. On the other hand, spherical colloidal particles confined between flexible lamellar membranes reduce the undulational fluctuations of lamellae and bring a repulsive inter-lamellar interaction. The behavior of the layer compression modulus of the lamellar membrane containing colloidal particles is well described by the entropical repulsive inter-lamellar interaction driven by steric hindrance.

Original languageEnglish
Pages (from-to)391-400
Number of pages10
JournalEuropean Physical Journal E
Volume13
Issue number4
DOIs
Publication statusPublished - 2004 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Chemistry(all)
  • Materials Science(all)
  • Surfaces and Interfaces

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