Published in
American Physical Society, Physical review E: Statistical, nonlinear, and soft matter physics, 6(70), 2004
DOI: 10.1103/physreve.70.062902
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Finite-size effects in biomimetic smectic films
,
J. Katsaras
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Abstract
Thin stacks of lipid multibilayers supported on rigid silicon and mica substrates are found to exhibit finite-size effects. Using neutron diffraction we find that the repeat spacing (d) of stacks containing up to a few tens of bilayers depends on their thickness (D), with d increasing with decreasing D. Differences in d are larger in the low-temperature Lbeta[prime] phase consisting of rigid bilayers than in the high-temperature Lalpha phase where the bilayers are more flexible. Various scenarios that may be responsible for this counterintuitive observation are discussed.