Thermal Unbinding of Highly Oriented Phospholipid Membranes
- 10 January 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 84 (2), 390-393
- https://doi.org/10.1103/physrevlett.84.390
Abstract
We present a temperature dependent x-ray reflectivity study of highly oriented, fully hydrated multilamellar phospholipid membranes. Both the specular and diffuse (nonspecular) x-ray reflectivity were measured for dimyristoyl-sn-glycero-phosphocholine (DMPC) and oleoyl-palmitoyl-sn-glycero-phosphocholine (POPC) on silicon substrates in excess water. In this configuration the repeat distance as well as the fluctuation spectra can be determined as a function of temperature. Both model systems studied exhibit a discontinuous unbinding transition from a substrate bound, multilamellar state to a state of freely dispersed bilayers in water. In the unbound phase a single membrane remains on the substrate.Keywords
This publication has 16 references indexed in Scilit:
- On a Possible Microscopic Mechanism Underlying the Vapor Pressure ParadoxBiophysical Journal, 1997
- Pseudocritical Behavior and Unbinding of Phospholipid BilayersPhysical Review Letters, 1995
- From bunches of membranes to bundles of stringsZeitschrift für Physik B Condensed Matter, 1995
- Critical Fluctuations in MembranesPhysical Review Letters, 1995
- Unbinding of symmetric and asymmetric stacks of membranesPhysical Review Letters, 1993
- Preparation of surfactant multilayer films on solid substrates by deposition from organic solutionThin Solid Films, 1990
- Measurement by x-ray diffraction methods of the layer compressional elastic constantBin the lyotropic smectic-A(Lα) phase of the lecithin-water systemPhysical Review A, 1989
- Unbinding transition of a biological model membranePhysical Review Letters, 1989
- X-ray scattering study of water intercalation into thin lyotropic multilayers. I. Molecular ordering and distinct states of hydrationPhysical Review A, 1989
- Unbinding Transitions of Interacting MembranesPhysical Review Letters, 1986