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Distillation is a powerful technique for separating the component substance from a miscible fluid mixture by means of selective evaporation and condensation. Distillation is of importance in many microfluidic applications, including food processing, gas/liquid separation, and biochemical. However, at the microscale, surface tension forces exceed gravitational and hydrodynamic forces, and hence traditional...
A high-performance MEMS-based gas chromatography (GC) device is proposed comprising a miniature serpentine column with dimensions of 3.2 m × 200 μm × 250 μm (length × width × depth) and an integrated Pt micro-heater. The column is fabricated on a Si die measuring 3.5 × 1.8 mm2 using a wet etching process and is bonded to a Pyrex cover plate incorporating the Pt micro-heater via a thermal fusion process...
This study proposed a high performance microfluidic rectifier utilizing self-induced virtual valves in a sudden expansion channel. An embedded block structure is used to enhance the formation of vortices at the sudden expansion channel. The effective hydraulic diameter of the microchannel is reduced due to the formation of the vortices and it hence increases the flow resistance of the microchannel...
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