We investigate the interaction between highly charged lipid bilayers in the presence of monovalent counterions. Neutron and X-ray reflectivity experiments show that the water layer between like-charged bilayers is thinner than for zwitterionic lipids, demonstrating the existence of counterintuitive electrostatic attractive interaction between them. Such attraction can be explained by taking into account the correlations between counterions within the Strong Coupling limit, which falls beyond the classical Poisson-Boltzmann theory of electrostatics. Our results show the limit of the Strong Coupling continuous theory in a highly confined geometry and are in agreement with a decrease in the water dielectric constant due to a surface charge-induced orientation of water molecules.
Attractive Interaction between Fully Charged Lipid Bilayers in a Strongly Confined Geometry / T. Mukhina, A. Hemmerle, V. Rondelli, Y. Gerelli, G. Fragneto, J. Daillant, T. Charitat. - In: THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS. - ISSN 1948-7185. - 10:22(2019 Nov), pp. 7195-7199.
|Titolo:||Attractive Interaction between Fully Charged Lipid Bilayers in a Strongly Confined Geometry|
|Settore Scientifico Disciplinare:||Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)|
|Data di pubblicazione:||nov-2019|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1021/acs.jpclett.9b02804|
|Appare nelle tipologie:||01 - Articolo su periodico|