| Issue |
J. Phys. I France
Volume 5, Number 7, July 1995
|
|
|---|---|---|
| Page(s) | 917 - 932 | |
| DOI | https://doi.org/10.1051/jp1:1995102 | |
J. Phys. I France 5 (1995) 917-932
Wetting Behaviour of Thin Diblock Films
Matthew S. Turner1, A. Johner2 and J.-F. Joanny21 Cavendish Laboratory, Madingley Road, Cambridge CB3 0HE, UK
2 Institut Charles Sadron, CRM, 6 rue Boussingault, 67083 Strasbourg Cedex, France
(Received 5 December 1994, received in final form 9 March 1995, accepted 15 March 1995)
Abstract
We study the wetting behaviour of a thin diblock copolymer film deposited on a solid substrate. Near
the wetting edge of a monolayer we find that the chains may be oriented parallel to the surface,
whereas in the layer interior they are perpendicular to it. These two orientations give rise to
two wetting transitions. Various edge configurations are predicted, depending on the surface
tensions. We find that bending/splay terms are only ever important near the wetting edge where they
fix the chain orientation parallel to the wetting edge. We also estimate the line tension associated
with the wetting edge. This quantity will control the growth of droplets.
© Les Editions de Physique 1995