title: X-ray standing waves: a molecular yardstick for biological membranes.
abstract: Structural information on an atomic scale has been obtained for a Langmuir-Blodgett (LB) trilayer system by means of long-period x-ray standing waves. The LB trilayer of zinc and cadmium arachidate was deposited on a layered synthetic microstructure (LSM) consisting of 200 tungsten/silicon layer pairs with a 25 A period. A 30 A thermally induced inward collapse of the zinc atom layer that was initially located in the LB trilayer at 53 A above the LSM surface has been observed. The mean position and width of the zinc atom layer was determined with a precision of +/- 0.3 A.
authors.affiliation: Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853.
authors.forename: M J
authors.initials: MJ
authors.lastname: Bedzyk
authors.forename: D H
authors.initials: DH
authors.lastname: Bilderback
authors.forename: G M
authors.initials: GM
authors.lastname: Bommarito
authors.forename: M
authors.initials: M
authors.lastname: Caffrey
authors.forename: J S
authors.initials: JS
authors.lastname: Schildkraut
mesh_terms: D008566:Membranes / Q000648:ultrastructure*; D010315:Particle Accelerators; D014961:X-Ray Diffraction