Lipid membranes on a surface grating studied by neutron reflectometryC. 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 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