Journal
FRONTIERS OF MECHANICAL ENGINEERING
Volume 12, Issue 4, Pages 510-525Publisher
HIGHER EDUCATION PRESS
DOI: 10.1007/s11465-017-0460-z
Keywords
digital microfluidics; electrowetting on dielectric; discrete droplet; biochemistry
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Funding
- Research Fund for the Doctoral Program of Higher Education of China [20133201110009]
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Digital microfluidics (DMF) is a versatile microfluidics technology that has significant application potential in the areas of automation and miniaturization. In DMF, discrete droplets containing samples and reagents are controlled to implement a series of operations via electrowetting-on-dielectric. This process works by applying electrical potentials to an array of electrodes coated with a hydrophobic dielectric layer. Unlike microchannels, DMF facilitates precise control over multiple reaction processes without using complex pump, microvalve, and tubing networks. DMF also presents other distinct features, such as portability, less sample consumption, shorter chemical reaction time, flexibility, and easier combination with other technology types. Due to its unique advantages, DMF has been applied to a broad range of fields (e.g., chemistry, biology, medicine, and environment). This study reviews the basic principles of droplet actuation, configuration design, and fabrication of the DMF device, as well as discusses the latest progress in DMF from the biochemistry perspective.
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