標題: General digital microfluidic platform manipulating dielectric and conductive droplets by dielectrophoresis and electrowetting
作者: Fan, Shih-Kang
Hsieh, Tsung-Han
Lin, Di-Yu
材料科學與工程學系奈米科技碩博班
Graduate Program of Nanotechnology , Department of Materials Science and Engineering
公開日期: 2009
摘要: A general digital (droplet-based) microfluidic platform based on the study of dielectric droplet manipulation by dielectrophoresis (DEP) and the integration of DEP and electrowetting-on-dielectric (EWOD) is reported. Transporting, splitting, and merging dielectric droplets are achieved by DEP in a parallel-plate device, which expands the fluids of digital microfluidics from merely being conductive and aqueous to being non-conductive. In this work, decane, hexadecane, and silicone oil droplets were successfully transported in a 150 mm-high gap between two parallel plates by applying a DC voltage above threshold voltages. Non-volatile silicone oil droplets with viscosities of 20 and 50 cSt were studied in more detail in parallel-plate geometries with spacings of 75 mu m, 150 mu m, and 225 mu m. The threshold voltages and the required driving voltages to achieve droplet velocities up to 4 mm/s in the different circumstances were measured. By adding a dielectric layer on the driving electrodes of the tested parallel-plate device, a general digital microfluidic platform capable of manipulating both dielectric and conductive droplets was demonstrated. DEP and EWOD, selectively generated by applying different signals on the same dielectric-covered electrodes, were used to drive silicone oil and water droplets, respectively. Concurrent transporting silicone oil and water droplets along an electrode loop, merging water and oil droplets, and transporting and separating the merged water-in-oil droplet were performed.
URI: http://hdl.handle.net/11536/7765
http://dx.doi.org/10.1039/b816535a
ISSN: 1473-0197
DOI: 10.1039/b816535a
期刊: LAB ON A CHIP
Volume: 9
Issue: 9
起始頁: 1236
結束頁: 1242
顯示於類別:期刊論文


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  1. 000265223200012.pdf