Abstract
Precise calculations are made of the scattering intensity from an oriented stack of lipid bilayers using a realistic model of fluctuations. The quantities of interest include the bilayer bending modulus the interbilayer interaction modulus B, and bilayer structure through the form factor It is shown how and B may be obtained from data at large where fluctuations dominate. Good estimates of can be made over wide ranges of by using in regions away from the peaks and for where details of the scattering domains play little role. Rough estimates of domain sizes can also be made from smaller data. Results are presented for data taken on fully hydrated, oriented DOPC bilayers in the phase. These results illustrate the advantages of oriented samples compared to powder samples.
- Received 13 July 2000
DOI:https://doi.org/10.1103/PhysRevE.63.011907
©2000 American Physical Society