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In this study, we look at alternative coatings to be used in DMF EWOD applications, specifically a natural surface, and synthetic fluorinated silica nanoparticle (FSNP) surfaces. Electrowetting on dielectric (EWOD) is a popular digital microfluidic (DMF) actuation approach, where droplets are moved over a series of electrodes. Hydrophobic coating is required to lower surface friction and enhance droplet...
An optical sensor integrated into a polymer microfluidic chip is proposed as a low cost solution to highly parallel biochemical analysis. The sensor consists of a single high-finesse optical resonator for direct analytes detection. High quality silica microspheres (diameter ~300 mum) are easily produced and low-loss whispering gallery modes were excited through evanescent coupling at wavelengths near...
The separation of gold(III) by selective extraction on an organic- impregnated filter (OIF) was studied. Gold was found to be rapidly extracted into the active polytetramethylene ether glycol (polyTHF) layer of the filter from strongly acidic solutions of HBr, as the HAuBr4 complex. Quantitative extraction of gold from solution was obtained with flow rates up to 600 ml min−1 through the 10.75 cm2...
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