title: Wetting at nonplanar substrates: unbending and unbinding.
abstract: 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 characterized by hyperuniversal scaling behavior. 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.
authors.affiliation: Mathematics Department, Imperial College, 180 Queen's Gate, London SW7 2BZ, United Kingdom.
authors.forename: C
authors.initials: C
authors.lastname: Rascón
authors.forename: A O
authors.initials: AO
authors.lastname: Parry
authors.forename: A
authors.initials: A
authors.lastname: Sartori