Abstract
Si plates were treated using two fluoroalkylsilanes (FAS17 and FAS3), and the internal fluidity of a water droplet sliding between two parallel plates on a slope was observed directly using particle image velocimetry (PIV) method with a high-speed camera system. The interfacial caterpillar-like rotation flows with slip motion at the solid-liquid interface were related to the combination of top and bottom wettabilities. The water droplets accelerated by a rolling and slipping motion on FAS17 coatings; the acceleration was dominated by a rolling motion on FAS3 coatings. A droplet's shape, solid-liquid molecular interaction, and the gravitic force will be important factors determining the sliding mode on a solid surface.
Original language | English |
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Pages (from-to) | 3414-3420 |
Number of pages | 7 |
Journal | Applied Surface Science |
Volume | 255 |
Issue number | 5 PART 2 |
DOIs | |
Publication status | Published - Dec 30 2008 |
Externally published | Yes |
Keywords
- Coatings
- Hydrophobicity
- Particle image velocimetry
- Silane
- Wetting
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films