Herbertson, D.L., Evans, C.R., Shirtcliffe, N.J., McHale, G. and Newton, M.I. ORCID: 0000-0003-4231-1002, 2006. Electrowetting on superhydrophobic SU-8 patterned surfaces. Sensors and Actuators A - Physical, 130, pp. 189-193. ISSN 0924-4247
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Abstract
Electrowetting on micro-patterned layers of SU8 photoresist with an amorphous Teflon® 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 40V 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: | Journal article | ||||
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Description: | Post-print | ||||
Publication Title: | Sensors and Actuators A - Physical | ||||
Creators: | Herbertson, D.L., Evans, C.R., Shirtcliffe, N.J., McHale, G. and Newton, M.I. | ||||
Publisher: | Elsevier | ||||
Place of Publication: | Lausanne, Switzerland | ||||
Date: | 2006 | ||||
Volume: | 130 | ||||
ISSN: | 0924-4247 | ||||
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Rights: | Copyright ©2005 Elsevier B.V. | ||||
Divisions: | Schools > School of Science and Technology | ||||
Record created by: | EPrints Services | ||||
Date Added: | 09 Oct 2015 09:40 | ||||
Last Modified: | 09 Jun 2017 13:07 | ||||
URI: | https://irep.ntu.ac.uk/id/eprint/779 |
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