Europhys. Lett.
Volume 71, Number 2, July 2005
Page(s) 311 - 317
Section Interdisciplinary physics and related areas of science and technology
Published online 15 June 2005
Europhys. Lett., 71 (2), pp. 311-317 (2005)
DOI: 10.1209/epl/i2004-10539-0

Lipid membranes on a surface grating studied by neutron reflectometry

C. Ollinger, D. Constantin, J. Seeger and T. Salditt

Institut fuer Roentgenphysik - Friedrich-Hund-Platz 1, 37077 Goettingen, Germany

received 23 July 2004; accepted in final form 23 May 2005
published online 15 June 2005

This experiment presents a new approach to measure elasticity parameters of lipid bilayers. We have deposited a stack of phospholipid bilayers on a silicon surface grating defined by e-beam lithography. The periodic surface profile acts as a boundary condition which imposes a controlled strain in the smectic film. Probing this distortion field by neutron reflectometry, we determine the smectic penetration length $\Lambda=\sqrt{K/B}$ from the relative intensity of the satellite peaks.

87.16.Dg - Membranes, bilayers, and vesicles.
61.12.Ha - Neutron reflectometry.
62.20.Dc - Elasticity, elastic constants.

© EDP Sciences 2005