title: Wetting Behavior in Colloid-Polymer Mixtures at Different Substrates.
abstract: We present experimental observations on wetting phenomena in depletion interaction driven, phase separated colloidal dispersions. The contact angle of the colloidal liquid-gas interface at a solid substrate was determined for a series of compositions. Upon approach to the critical point, a transition occurs from partial to complete wetting. The interaction with the substrate was manipulated by modifying the substrate with a polymer. In that case, a transition from partial to complete drying is observed upon approach to the critical point.
authors: Laboratory of Physical Chemistry and Colloid Science, Wageningen University, P. O. Box 8038, 6700 EK Wageningen, The Netherlands.
authors: Willem K
authors: WK
authors: Wijting
authors: Laboratory of Physical Chemistry and Colloid Science, Wageningen University, P. O. Box 8038, 6700 EK Wageningen, The Netherlands.
authors: Nicolaas A M
authors: NA
authors: Besseling
authors: Laboratory of Physical Chemistry and Colloid Science, Wageningen University, P. O. Box 8038, 6700 EK Wageningen, The Netherlands.
authors: Martien A
authors: MA
authors: Cohen Stuart