Free-surface microscale flows have been attracting increasing attention from the research community in recent times, as attributable to their diverse fields of applications ranging from fluid mixing and particle manipulation to biochemical processing on a chip. Traditionally, electrically driven processes governing free surface microfluidics are mostly effective in manipulating fluids having characteristically low values of the electrical conductivity (lower than 0.085 S/m). Biological and biochemical processes, on the other hand, typically aim to manipulate fluids having higher electrical conductivities (>0.1 S/m). To circumvent the inherent limitation of traditional electrokinetic processes in manipulating highly conductive fluids in free surface flows, here we experimentally develop a novel on-chip methodology for the same by exploiting the interaction between an alternating electric current and an induced thermal field. We show that the consequent local gradients in physical properties as well as interfacial tension can be tuned to direct the flow toward a specific location on the interface. The present experimental design opens up a new realm of on-chip process control without necessitating the creation of a geometric confinement. We envisage that this will also open up research avenues on open-channel microfluidics, an area that has vastly remained unexplored.
机构:
Hanyang Univ, Dept Biomed Engn, Seoul 04763, South Korea
Hanyang Univ, Dept Elect Engn, Seoul 04763, South Korea
Hanyang Univ, Inst Nano Sci & Technol, Seoul, South KoreaPukyong Univ, Dept Biomed Engn, Busan 48513, South Korea
机构:
Chuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
Murakami, Tomoki
Teratani, Hiroto
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Chuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
Teratani, Hiroto
Aoki, Dai'ichiro
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机构:
Aeternus Co Ltd, Minamidai 2-1-14, Fujimino, Saitama 3560036, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
Aoki, Dai'ichiro
Noguchi, Masao
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Caravell Co Ltd, Surugadai 1-29-39, Funabashi, Chiba 2730862, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
Noguchi, Masao
Tsugane, Mamiko
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Chuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
Tsugane, Mamiko
Suzuki, Hiroaki
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Chuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, JapanChuo Univ, Grad Sch Sci & Engn, Dept Precis Mech, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan
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Univ Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Univ Santiago de Compostela, Dept Quim Organ, Santiago De Compostela 15782, SpainUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Mendez-Ardoy, Alejandro
Bayon-Fernandez, Alfonso
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Univ Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Univ Santiago de Compostela, Dept Quim Organ, Santiago De Compostela 15782, SpainUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Bayon-Fernandez, Alfonso
Yu, Ziyi
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Univ Cambridge, Dept Chem, Cambridge CB2 1EW, EnglandUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Yu, Ziyi
Abell, Chris
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Univ Cambridge, Dept Chem, Cambridge CB2 1EW, EnglandUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Abell, Chris
Granja, Juan R.
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Univ Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Univ Santiago de Compostela, Dept Quim Organ, Santiago De Compostela 15782, SpainUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Granja, Juan R.
Montenegro, Javier
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Univ Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain
Univ Santiago de Compostela, Dept Quim Organ, Santiago De Compostela 15782, SpainUniv Santiago de Compostela, Ctr Singular Invest Quim Biol & Mat Mol CIQUS, Santiago De Compostela 15782, Spain