Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2009-09-28
Physical Review Letters 104, 116102 (2010)
Physics
Condensed Matter
Soft Condensed Matter
4 pages, 6 figures
Scientific paper
10.1103/PhysRevLett.104.116102
When placed on rough hydrophobic surfaces, water droplets of diameter larger than a few millimeters can easily form pearls, as they are in the Cassie-Baxter state with air pockets trapped underneath the droplet. Intriguingly, a natural evaporating process can drive such a Fakir drop into a completely wetting (Wenzel) state. Our microscopic observations with simultaneous side and bottom views of evaporating droplets upon transparent hydrophobic microstructures elucidate the water-filling dynamics and the mechanism of this evaporation-triggered transition. For the present material the wetting transition occurs when the water droplet size decreases to a few hundreds of micrometers in radius. We present a general global energy argument which estimates the interfacial energies depending on the drop size and can account for the critical radius for the transition.
Lammertink Rob G. H.
Lohse Detlef
Tsai Peichun
Wessling Matthias
No associations
LandOfFree
Evaporation-triggered Wetting Transition for Water Droplets upon Hydrophobic Microstructures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evaporation-triggered Wetting Transition for Water Droplets upon Hydrophobic Microstructures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaporation-triggered Wetting Transition for Water Droplets upon Hydrophobic Microstructures will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-234647