The European Physical Journal E

, Volume 13, Issue 4, pp 391–400 | Cite as

Inter-lamellar interactions modulated by addition of guest components

  • M. ImaiEmail author
  • R. Mawatari
  • K. Nakaya
  • S. Komura


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.


Polymer Steric Hindrance Colloidal Particle Compression Modulus Lamellar Phase 
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© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  1. 1.Department of Physics, Faculty of ScienceOchanomizu UniversityTokyoJapan
  2. 2.Department of Chemistry, Faculty of ScienceTokyo Metropolitan UniversityTokyoJapan

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