Elastic Properties of Lipid Bilayers: Theory and Possible Experiments

  title={Elastic Properties of Lipid Bilayers: Theory and Possible Experiments},
  author={W. Helfrich},
  journal={Zeitschrift f{\"u}r Naturforschung C},
  pages={693 - 703}
  • W. Helfrich
  • Published 1973
  • Chemistry, Materials Science, Medicine
  • Zeitschrift für Naturforschung C
Abstract A theory of the elasticity of lipid bilayers is proposed. Three types of strain, i. e. stretching, tilt and curvature, are distinguished and the associated stresses are identified. It is argued that in the case of vesicles (= closed bilayer films) the only elasticity controlling nonspherical shapes is that of curvature. Euler-Lagrange equations are derived for the shape in magnetic fields and under excess outside pressure. It is shown that magnetic fields can deform spherical vesicles… Expand

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