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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| Institution: | 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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