Coupling between membrane tilt-difference and dilation: a new ``ripple'' instability and multiple crystalline inclusions phases

Abstract

A continuum Landau theory for the micro-elasticity of membranes is discussed, which incorporates a coupling between the bilayer thickness variation and the difference in the two monolayers' tilts. This coupling stabilizes a new phase with a rippled micro-structure. Interactions among membrane inclusions combine a dilation-induced attraction and a tilt-difference-induced repulsion that yield 2D crystal phases, with possible coexistence of different lattice spacings for large couplings. Inclusions favoring crystals are those with either a long-convex or a short-concave hydrophobic core.

EURO LaTeX, 6 pages, 4 figures, to be published in Europhys. Lett

References in corpus (2)

• The Role of Bilayer Tilt Difference in Equilibrium Membrane Shapes
• Interactions between Membrane Inclusions on Fluctuating Membranes

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