Wetting at Non-Planar Substrates: Unbending & Unbinding

Details Wetting at Non-Planar Substrates: Unbending & Unbinding Wetting at Non-Planar Substrates: Unbending & Unbinding

1999-02-04

arxiv.org/abs/cond-mat/9902070v1

Physics

Condensed Matter

Soft Condensed Matter

To be published in Physical Review E (14 pages, 4 figures)

Scientific paper

10.1103/PhysRevE.59.5697

We consider fluid wetting on a corrugated substrate using effective interfacial Hamiltonian theory and show that breaking the translational invariance along the wall can induce an 'unbending' phase transition in addition to unbinding. Both first order and second order unbending transitions can occur at and out of coexistence. Results for systems with short-ranged and long-ranged forces establish that the unbending critical point is characterised by hyperuniversal scaling behaviour. We show that, at bulk coexistence, the adsorption at the unbending critical point is a universal multiple of the adsorption for the correspondent planar system.

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