X-ray standing waves: a molecular yardstick for biological membranes.
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.
Bedzyk
M J
MJ
Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853.
Bilderback
D H
DH
Bommarito
G M
GM
Caffrey
M
M
Schildkraut
J S
JS
D008566:Membranes / Q000648:ultrastructure*; D010315:Particle Accelerators; D014961:X-Ray Diffraction