X-ray reflectivity of solid-supported, multilamellar membranes |
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| Authors: | T. Salditt C. Li A. Spaar U. Mennicke |
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| Affiliation: | Experimentphysik, Universit?t des Saarlandes, Postfach 15 11 50, 66041 Saarbrücken, Germany, DE
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| Abstract: | We have investigated the structure of solid-supported, multilamellar membranes by X-ray reflectivity. The density profile is obtained by fitting the full q-range to a model using the bilayer Fourier coefficients as fitting parameters. The effect of hydration and the substrate boundary condition are discussed in view of the well-known Landau-Peierls effect and its implications for structure determination. The resulting bilayer density profile agrees remarkably well with previously published data of a molecular dynamics (MD) simulation for 1,2-oleoyl-palmitoyl-sn-glycero-3-phosphocholine (OPPC). Received 1 October 2001 and Received in final form 21 December 2001 |
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| Keywords: | PACS. 61.10.Kw X-ray reflectometry (surfaces, interfaces, films) – 87.16.Dg Membranes, bilayers, and vesicles – 87.15.Ya Fluctuations |
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