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This paper reports the separation of a binary solution using liquid-liquid microextraction enabled by an electrowetting on dielectric (EWOD) digital microfluidics. Liquid-liquid extraction (LLE) is a method to separate compounds based on their relative solubilities in two different immiscible liquids. By EWOD DMF operation, droplets of an aqueous binary solution and ionic liquid which is immiscible...
Ionic liquids are increasingly attracting the attention of researchers in both academia and industry. However, research into ionic liquids is mainly limited in chemistry, and the electromagnetic characteristics and microfluidic/optofluidic applications of ionic liquids have been rarely studied. Here, ionic liquids are used as a new type of fluid material for microfluidics/optofluidics, and the research...
The photo-patterning of photoresponsive N-isopropylacrylamide based ionogel microstructures is investigated. The ionogels are synthesised using phosphonium based room temperature ionic liquids together with a photochromic compound benzospiropyran. These stimuli responsive materials can be actuated simply by using light irradiation, facilitating non-contact and non invasive operation. For the first...
A mixture of glycerin with salt water is proposed as a mean for piezoresistive strain measurement. Electrochemical impedance spectroscopy (EIS) is conducted for the investigation of the electrical conductive behavior of the mixture confined within a definite volume. The role of glycerin is to increase the viscosity of the mixture, to reduce water loss due to evaporation and to lower the rate of corrosion...
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