Manipulating equilibrium shape transitions of microdroplets in electrowetting - A computational analysis

Drygiannakis, AI; Papathanasiou, AG; Boudouvis, AG

dc.contributor.author	Drygiannakis, AI	en
dc.contributor.author	Papathanasiou, AG	en
dc.contributor.author	Boudouvis, AG	en
dc.date.accessioned	2014-03-01T01:31:02Z
dc.date.available	2014-03-01T01:31:02Z
dc.date.issued	2009	en
dc.identifier.issn	0167-9317	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19720
dc.subject	Contact angle	en
dc.subject	Droplet breakup	en
dc.subject	Electrowetting	en
dc.subject	Galerkin/finite elements	en
dc.subject	Stability	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.classification	Nanoscience & Nanotechnology	en
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Applied voltages	en
dc.subject.other	Breaking process	en
dc.subject.other	Computational analysis	en
dc.subject.other	Conductive liquids	en
dc.subject.other	Droplet breakup	en
dc.subject.other	Electrowetting	en
dc.subject.other	Element methods	en
dc.subject.other	Equal sizes	en
dc.subject.other	Equilibrium shapes	en
dc.subject.other	Galerkin/finite elements	en
dc.subject.other	Governing equations	en
dc.subject.other	Micro-droplets	en
dc.subject.other	Planar electrodes	en
dc.subject.other	Shape transitions	en
dc.subject.other	Contact angle	en
dc.subject.other	Dielectric materials	en
dc.subject.other	Dielectric properties	en
dc.subject.other	Drop formation	en
dc.subject.other	Electrodes	en
dc.subject.other	System stability	en
dc.subject.other	Drop breakup	en
dc.title	Manipulating equilibrium shape transitions of microdroplets in electrowetting - A computational analysis	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mee.2008.12.066	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mee.2008.12.066	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	In this work is studied a typical electrowetting setup, which consists of a conductive liquid droplet confined between two parallel dielectric-coated planar electrodes, under the action of an applied voltage. Manipulation of the shape transitions of microdroplets in such a system can be achieved by suitable selection of system parameters, such as dielectric properties and voltage values. Breakup transitions have been observed when the applied voltage exceeds a threshold. For identical electrodes the breaking process is symmetric and results into a pair of equal size droplets. However, using dielectrics with different properties, the symmetry is broken and therefore the droplet breaks into two uneven parts. Here, by employing the Galerkin/finite element method we solve the governing equations of the capillary electro-hydrostatics. The results show that by carefully tuning the voltages applied to the electrodes we are able to control the shape of the confined droplet and/or the size of the resulting droplets. (C) 2008 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Microelectronic Engineering	en
dc.identifier.doi	10.1016/j.mee.2008.12.066	en
dc.identifier.isi	ISI:000267273300240	en
dc.identifier.volume	86	en
dc.identifier.issue	4-6	en
dc.identifier.spage	1365	en
dc.identifier.epage	1367	en