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Published on: October 16, 2021
Electrowetting (EW)-based valve combined with hydrophilic teflon microfluidic guidance in controlling continuous
Ji-Yen Cheng1, Lo-Chang Hsiung
1Research Center for Applied Sciences, Academia Sinica, Taiwan. jycheng@gate.sinica.edu.tw
Abstract:
Electrowetting (EW)-based techniques have been widely used in manipulating discrete liquid. However, few articles discussed the controlling of continuous fluid flow by using EW-based techniques. In this paper, an EW-based valve combined with plasma-modified Teflon surface, which serves as a microfluidic guidance, in controlling continuous fluid flow has been demonstrated. The plasma-modified Teflon surface is firstly demonstrated for confining continuous fluid flow. The EW-based microfluidic device possesses the functions of a valve and a microchannel without complex moving parts and grooved microchannels. The quantitative characteristics of the EW-based valve are also studied. Propylene carbonate (PC) is firstly demonstrated as the working liquid in the EW-based device because of its applications in parallel oligonucleotide synthesis. It is found that lower valve actuation voltage reduces the deterioration of the valve and improves the valve stability.
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