Journal
MICROFLUIDICS AND NANOFLUIDICS
Volume 17, Issue 5, Pages 781-807Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-014-1385-z
Keywords
Electrochemistry; Working electrode; Reference electrode; Lab-on-a-chip devices; Electrochemical detection
Funding
- NSF [CBET 0636254]
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Electrochemical techniques are widely used in microfluidic and nanofluidic devices because they are suitable for miniaturization, have better sensitivity compared to optical detection techniques, and their components can be reliably microfabricated. In addition to the detection and quantification of analytes, electrochemical techniques can be used to monitor processes such as biological cell death and protein/DNA separations/purifications. Such techniques are combined with micro- and nanofluidic devices with point-of-care (POC) applications in mind, where cost, footprint, ease of use, and independence from peripheral equipment are critical for a viable design. A large variety of electrode materials and device configurations have been employed to meet these requirements. This review introduces the reader to the major electrochemical techniques, materials, and fabrication methods for working and reference electrodes, and to surface modifications of electrodes to facilitate electrochemical measurements, in the context of micro- and nanofluidic devices. The continuing development of these techniques holds promise for the next-generation lab-on-a-chip devices, which can realize the goals of this technology such as POC clinical analysis.
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