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MICRO FLUIDICS | ARTICLE


<< Figure 5: Electrode chips. >>


Field electrodes are used to conduct electrical current and generate electrical fields for controlling electroosmotic flows or to perform electrophoresis. Detection electrodes are used to measure the local electrical conductivity or impedance of the liquid in a fluidic channel. These electrodes are used for example for detection on capillary electrophoresis chips, but can also be used to count and characterise particles or biological cells. The


combination of electrical heaters and temperature sensors on a chip provides a convenient means to heat fluids inside micro channels and measure the temperature. This technology can also be used for creating a time-of-flight flow sensor. Electrodes embedded into a micro fluidics chip can be used to make electrical contact with gas and fluids.


>> Continued on page 34


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Discover the Tronics difference at www.tronicsgroup.com 33 | commercial micro manufacturing international Vol 7 No.3


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