Herbertson, Dale, Evans, Carl, Shirtcliffe, Neil, McHale, Glen and Newton, Michael (2006) Electrowetting on superhydrophobic SU-8 patterned surfaces. Sensors and Actuators A: Physical, 130-1. pp. 189-193. ISSN 0924-4247
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Abstract
Electrowetting on micro-patterned layers of SU-8 photoresist with an amorphous Teflon (R) coating has been observed. The cosine of the contact angle is shown to be proportional to the square of the applied voltage for increasing bias. However, this does not apply below 40 V and we suggest that this may be explained in terms of penetration of fluid into the pattern of the surface. Assuming that the initial application of a bias voltage converts the drop from Cassie-Baxter to Wenzel regime, we have used this as a technique to estimate the roughness factor of the surface.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | electrowetting, EWOD, superhydrophobic |
| Subjects: | F100 Chemistry F300 Physics H600 Electronic and Electrical Engineering |
| Department: | Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering |
| Depositing User: | Glen McHale |
| Date Deposited: | 13 Aug 2012 15:09 |
| Last Modified: | 17 Dec 2023 12:46 |
| URI: | https://nrl.northumbria.ac.uk/id/eprint/8325 |
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