Electrowetting water droplet contact angle relaxation on coated stainless steel plates Online publication date: Fri, 17-Jun-2016
by Abdulwahab S. Aljuhani; George G. Chase
International Journal of Surface Science and Engineering (IJSURFSE), Vol. 10, No. 3, 2016
Abstract: Contact angle relaxation was investigated for water droplets on coated stainless steel surfaces. Contact angles of water droplets on electrowettable surfaces were measured to investigate the effects of the electrode geometry and electrical potential exposure time. Two geometric configurations were evaluated using a flat stainless steel plate as one electrode and either a horizontal or a vertical wire as the second electrode. The macroscopic contact angles were compared with the angles predicted by the Young-Lippmann equation. The results show that contact angle relaxation was higher in the horizontal electrode arrangement than for the vertical electrode arrangement. At 200 VDC the drops moved along the horizontal wire electrode whereas they did not move in the vertical wire electrode arrangement at the same voltage. The activation voltage for the reversible change in the macroscopic contact angle was found to be in the range of 40 VDC to 200 VDC.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Surface Science and Engineering (IJSURFSE):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook