NDLI: Microfluidic liquid actuation through ground-directed electric discharge

Content Provider	Springer Nature Link
Author	Escobedo, Carlos Sinton, David
Copyright Year	2011
Abstract	In this article, we present a new technique to actuate liquids in microchannels using ground-directed electric discharge generated by a portable corona device. When an electric discharge is applied, the air in the microchannel is ionized causing a change in the surface energy. The resulting change in the contact angle induces rapid liquid transport through the channel by capillary action. In contrast to established plasma treatment this method employs a ground electrode that guides the electric field. This approach enables rapid treatment of select microchannels and thus provides a means of real-time fluid actuation as opposed to simply a pretreatment process. Instantaneous fluid velocities show power-law dependence with time and fit theoretical models at a contact angle of 65°. Average fluid velocities are on the order of 5 cm/s, and thus channels on the order of 1-cm long are filled in ~0.2 s. To demonstrate the potential of this technique for integrated lab-on-a-chip applications, the method was employed in serpentine channel, for on-demand fluid routing, to initiate a mixing process, and through an on-chip integrated microelectrode.
Starting Page	653
Ending Page	662
Page Count	10
File Format	PDF
ISSN	16134982
Journal	Microfluidics and Nanofluidics
Volume Number	11
Issue Number	6
e-ISSN	16134990
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-06-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electric discharge Plasma Microfluidic Nanofluidic Contact angle Capillary flow Surface tension Microfluidic liquid actuation Corona Biomedical Engineering Industrial Chemistry/Chemical Engineering Engineering Fluid Dynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Materials Chemistry Condensed Matter Physics Electronic, Optical and Magnetic Materials

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