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Author (up) Hemmerle, A.; Fragneto, G.; Daillant, J.; Charitat, T. url  doi
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  Title Reduction in Tension and Stiffening of Lipid Membranes in an Electric Field Revealed by X-Ray Scattering Type Journal Article
  Year 2016 Publication Physical Review Letters Abbreviated Journal Phys Rev Lett  
  Volume 116 Issue 22 Pages 228101  
  Keywords  
  Abstract The effect of ac electric fields on the elasticity of supported lipid bilayers is investigated at the microscopic level using grazing incidence synchrotron x-ray scattering. A strong decrease in the membrane tension up to 1 mN/m and a dramatic increase of its effective rigidity up to 300 k_{B}T are observed for local electric potentials seen by the membrane less, similar1 V. The experimental results are analyzed using detailed electrokinetic modeling and nonlinear Poisson-Boltzmann theory. Based on a modeling of the electromagnetic stress, which provides an accurate description of the bilayer separation versus pressure curves, we show that the decrease in tension results from the amplification of charge fluctuations on the membrane surface whereas the increase in bending rigidity results from the direct interaction between charges in the electric double layer. These effects eventually lead to a destabilization of the bilayer and vesicle formation. Similar effects are expected at the tens of nanometers length scale in cell membranes with lower tension, and could explain a number of electrically driven processes.  
  Address UPR 22/CNRS, Institut Charles Sadron, Universite de Strasbourg, 23 rue du Loess, BP 84047 67034 Strasbourg Cedex 2, France  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0031-9007 ISBN Medium mcube  
  Area Expedition Conference  
  Notes PMID:27314739 Approved no  
  Call Number Admin @ benzerara @ Serial 13984  
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