title: Crossover effects in the wetting of adsorbed films in linear wedges.
abstract: We have measured the growth of liquid Ar adsorbed on arrays of linear wedges structured in different ways. In the most regular patterns, a clear crossover from a planarlike to a geometry-dependent growth behavior is observed. This crossover is found to depend on the characteristic wedge size and its position, in the case of a regular pattern, agrees well with theoretical predictions. Near liquid-vapor bulk coexistence, the film mass is observed to diverge as a power law of the chemical potential difference from saturation with an exponent in very good agreement with the value of -2 expected for a linear wedge. This exponent is not affected by the opening angles of the wedges. The form of the next-to-leading order singular term in the asymptotic divergence of the mass has also been investigated. The experimentally determined value of the exponent is consistent with the expected theoretical result of -4/3.
authors.affiliation: Istituto Nazionale per la Fisica della Materia and Dipartimento di Fisica G. Galilei, Università di Padova, via Marzolo 8, 35131 Padova, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Bruschi
authors.forename: A
authors.initials: A
authors.lastname: Carlin
authors.forename: A O
authors.initials: AO
authors.lastname: Parry
authors.forename: G
authors.initials: G
authors.lastname: Mistura