Volume 53, Number 1, January 2001
|Page(s)||100 - 106|
|Section||Interdisciplinary physics and related areas of science and technology|
|Published online||01 December 2003|
A fluid floating bilayer
Institut Laue-Langevin - B.P. 156, F-38042 Grenoble Cedex,
2 INFM - Genova, Italy
3 Institut Charles Sadron (CNRS-UPR 22.) - 6 rue Boussingault, F-67083 Strasbourg Cedex, France
4 Spectrométrie Physique (CNRS-UMR 5588, Université Grenoble I.) - B.P. 87, F-38402 St Martin d'Hères Cedex, France
5 Bergische Universität Wuppertal, Fachbereich Physik - D-42097 Wuppertal, Germany
6 DRFMC/SP2M/SGX CEA - 17 Avenue des Martyrs, F-38054 Grenoble, France
Corresponding author: email@example.com
Accepted: 20 October 2000
A highly hydrated lipid bilayer, floating a few Åabove another one adsorbed on a smooth solid substrate, was prepared at room temperature where lipids (DSPC) are in gel phase, then heated at several temperatures including the pretransitional temperature and the chain melting temperature . A precise in situ characterization by neutron reflectivity led to two new results. First, even when in fluid phase the floating bilayer was structured and stable; it thus provides a flexible model system for physical and biophysical studies of membranes. Second, at intermediate temperatures, a spectacular maximum in both inter-bilayer distance and bilayer roughness was simultaneously observed. It might be a direct observation of the balance between energy minimization and entropic repulsion, leading to an estimation of the dimensionless parameter , where A is the Hamacker constant and κ the bending modulus.
PACS: 87.16.Dg – Membranes, bilayers and vesicles / 87.15.Ya – Fluctuations / 61.12.Ha – Neutron reflectometry
© EDP Sciences, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.