| Autor: |
Ibarra-Bracamontes, Laura, Mossman, Michele, Whitehead, Lorne |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; Sep2012, Vol. 112 Issue 6, p064913, 7p |
| Abstrakt: |
We present an experimental study of the deformation of oil-water interfaces under the influence of applied electric fields. In a new experimental approach, a pattern of regions with hydrophilic or hydrophobic surface properties is formed on a substrate and oil drops in an ambient environment of water are confined to specific regions of the substrate by this pattern. As with electrowetting, the shape of the oil-water interface can be changed by applying an electric field that changes the surface energy relationship at the interface. However, in this new method the contact line does not move. Surprisingly, although this behavior is a result of microscopic-scale electrostatic forces, only small surface shape changes result. Nevertheless, the changing interfacial shape can cause macroscopic fluid flow. In this paper, we use video microscopy and image analysis to investigate the dynamic evolution of the interface under various conditions, in order to explain this counterintuitive result. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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