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Commonly, microelectrodes used in microfluidics are made from copper, Au or Pt. They are difficult to fabricate and the cost is relatively high. Thus, we designed and fabricated a novel microelectrode made from silicon for it is cheap and easy to fabricate. It has been proven that cells can be manipulated by dielectrophoresis force producing on interdigitated electrodes. In addition, the direction...
The plug-like fluidic profile is one of most advantages of electroosmotic flow, which influences the reproducibility, sensitivity and separation efficiency of the microfluidic devices. Electroosmotic flow in microchannels with hydraulic diameters of less than 20 microns are investigated experimentally and qualitatively compared with prediction in electric double layer (EDL) theory. Fluidic profiles...
5SPE (Solid phase extraction) method, which is compatible with MEMS (micro-electro-mechanical system) technology, has proven efficient and amenable to microfluidic chips. An SPE microfluidic chip for DNA extraction by using porous silicon dioxide as the solid phase matrix has been developed. Porous matrix coated on the wall of the channel in the microfluidic chip to provide a surface-enlarging matrix,...
A novel passive micromixer with rapid mixing and low pressure drop has been successfully demonstrated by simulations and micro-fabrication. The structure of this micro-mixer contains one main channel, two sub-channels for injecting the other specie and some baffles in the main channel to form mixing chambers. Adding baffles to the main channel will produce the recirculation to increase the contact...
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