The European Physical Journal E

, Volume 20, Issue 4, pp 401–408

Size and stability of liposomes: A possible role of hydration and osmotic forces

  • J. Sabın
  • G. Prieto
  • J. M. Ruso
  • R. Hidalgo-Álvarez
  • F. Sarmiento
Regular Article

DOI: 10.1140/epje/i2006-10029-9

Cite this article as:
Sabın, J., Prieto, G., Ruso, J.M. et al. Eur. Phys. J. E (2006) 20: 401. doi:10.1140/epje/i2006-10029-9

Abstract.

Dynamic light scattering and electrophoretic mobility measurements have been used to characterize the size, size distribution and zeta potentials (ζ-potentials) of egg yolk phosphatidylcholine (EYPC) liposomes in the presence of monovalent ions ( Na+ and K+). To study the stability of liposomes the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory has been extended by introducing the hydrated radius of the adsorbed ions onto the liposome surfaces. The decrease of liposome size is explained on the basis of the membrane impermeability to some ions which generate osmotic forces, which leads to evacuate water from liposome inside.

PACS.

87.16.Dg Membranes, bilayers, and vesicles 87.68.+z Biomaterials and biological interfaces 89.75.-k Complex systems 

Copyright information

© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  • J. Sabın
    • 1
  • G. Prieto
    • 1
  • J. M. Ruso
    • 1
  • R. Hidalgo-Álvarez
    • 2
  • F. Sarmiento
    • 1
  1. 1.Biophysics and Interfaces Group, Department of Applied PhysicsUniversity of Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Biocolloid and Fluid Physics Group, Department of Applied Physics, Faculty of SciencesUniversity of GranadaGranadaSpain

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