Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces

Details Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces

2008-01-17

arxiv.org/abs/0801.2683v1

Physics

Fluid Dynamics

9 pages, 5 figures

Scientific paper

We investigate directly at the microscale the morphology of the electrowetting induced transition between the Cassie-Baxter and Wenzel states for a water droplet on a superhydrophobic surface. Our experiments demonstrate that the transition originates in a very narrow annular region near the macroscopic contact line, which is first invaded by water and causes a thin film of air to be entrapped below. At high applied voltages, a growing fraction of microscopic air-pockets collapse, resulting in a partialWenzel state. Modulations in the intensity of the light reflected from individual micro-menisci clarify that the local contact angles near the filling transition are close to the usual advancing values for contact lines on smooth surfaces.

Affiliated with

Also associated with

No associations

Rating

Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces 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 Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic structure of electrowetting-driven transitions on superhydrophobic surfaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-393184