| Issue |
Europhys. Lett.
Volume 39, Number 6, September 1997
|
|
|---|---|---|
| Page(s) | 633 - 638 | |
| Section | Condensed matter: structure, thermal and mechanical properties | |
| DOI | https://doi.org/10.1209/epl/i1997-00406-6 | |
| Published online | 01 September 2002 | |
Effect of surface roughness on bulk-disorder–induced wetting
1
Dipartimento di Fisica and Sezione INFN, Università di Bologna,
I-40126 Bologna Italy
2
INFM-Dipartimento di Fisica and Sezione INFN, Università
di Padova, I-35131 Padova, Italy
3
Dipartimento di Fisica and INFN (Gruppo Collegato di Udine)
Università di Udine, I-33100 Udine, Italy
Received:
17
April
1997
Accepted:
11
August
1997
Transfer-matrix results in 
show that wetting of a rough, self-affine
wall induced by bulk bond disorder turns discontinuous
as soon as the wall roughness exponent 
exceeds 
,
the spatial anisotropy index of interface fluctuations in the bulk.
For 
critical wetting is recovered, in the same universality
class as for the flat-wall case.
These and related findings suggest a free-energy structure such to
imply first-order wetting also without disorder,
or in 
, whenever exceeds the appropriate 
.
The same thresholds should apply also with van der Waals forces, in cases
when implies a strong-fluctuation regime.
PACS: 68.45.Gd – Wetting / 05.70.Fh – Phase transitions: general aspects / 82.65.Dp – Thermodynamics of surfaces and interfaces
© EDP Sciences, 1997
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