期刊
APPLIED PHYSICS LETTERS
卷 102, 期 18, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4803917
关键词
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资金
- Biotechnology and Biological Sciences Research Council (BBSRC)
- Frances and Augustus Newman Foundation
- Engineering and Physical Sciences Research Council (EPSRC)
- Swiss National Science Foundation (SNF)
- BBSRC [BB/J002119/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/J002119/1, 1127850] Funding Source: researchfish
We describe the fabrication and characterization of solid 3-dimensional electrodes in direct contact with microfluidic channels, implemented using a single photolithography step, and allowing operation in high-dielectric constant media. Incorporation and self-alignment of electrodes is achieved by combining microsolidic approaches with exploitation of the surface tension of low melting point alloys. Thus the metal forms the walls flanking the channel. We show that this approach yields electrodes with a well-defined, reproducible morphology and stable electronic properties when in contact with biochemical buffers. By combining calibration of the electric field with free-flow electrophoresis, we quantify the net solvated charges of small molecules. (C) 2013 AIP Publishing LLC.
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