| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 593575 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2013 | 4 Pages |
A theory for wetting of structured solid surfaces is developed, based on the delta-comb periodic potential. It possesses two matching parameters: the effective line tension and the friction coefficient on the three-phase contact line at the surface. The theory is validated on the dynamics of spreading of liquid zinc droplets on morphologically patterned zinkophilic iron surface by means of square patterns of zinkophobic aluminum oxide. It is found out that the effective line tension is negative and has essential contribution to the dynamics of spreading. Thus, the theoretical analysis shows that the presence of lyophobic patterns situated on lyophilic surface makes the latter completely wettable, i.e. no equilibrium contact angle on such surface exists making the droplet spread completely in form of thin liquid layer on the patterned surface.
Graphical abstractSketch on self-spreading of liquid zinc droplet on the patterned surfaces (not to scale).Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Partially hydrophilic surface. ► Morphological patterning with hydrophobic pillars. ► Super-hydrophilic surface.
