 03429 De Coninck J., MiracleSol\'{e} S., Ruiz J.
 Wetting of Heterogeneous Surfaces at the Mesoscopic Scale
(91K, LATeX 2e)
Sep 18, 03

Abstract ,
Paper (src),
View paper
(auto. generated ps),
Index
of related papers

Abstract. We consider the problem of
wetting on a heterogeneous wall with mesoscopic defects: i.e.\
defects of order $L^{\varepsilon}$, $0<\varepsilon<1$, where $L$ is
some typical lengthscale of the system. In this framework, we
extend several former rigorous results which were shown for walls
with microscopic defects \cite{DMR,DMR2}. Namely, using
statistical techniques applied to a suitably defined semiinfinite
Isingmodel, we derive a generalization of Young's law for rough
and heterogeneous surfaces, which is known as the generalized
CassieWenzel's equation. In the homogeneous case, we also show
that for a particular geometry of the wall, the model can exhibit
a surface phase transition between two regimes which are either
governed by Wenzel's or by Cassie's law.
 Files:
03429.tex