Electrowetting on semiconductors
Abstract
Applying a voltage difference between a conductor and a sessile droplet sitting on a thin dielectric film separating it from the conductor will cause the drop to spread. When the conductor is a good metal, the change of the drop's contact angle due to the voltage is given by the Young-Lippmann (YL) equation. Here, we report experiments with lightly doped, single crystal silicon as the conductive electrode. We derive a modified YL equation that includes effects due to the semiconductor and contact line pinning. We show that light induces a non-reversible wetting transition, and that our model agrees well with our experimental results.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 05, 2015
- Source ID
- 10.1063/1.4905348
Entities
People
- Cesar Palma
- Robert D Deegan
Organizations
- Defense Advanced Research Projects Agency
- University of Michigan