X-ray standing waves: a molecular yardstick for biological membranes |
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| Authors: | M J Bedzyk D H Bilderback G M Bommarito M Caffrey J S Schildkraut |
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| Institution: | Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, NY 14853. |
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| 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. |
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