Novel multifunctional materials based on ionic liquids: on demand micro-valve actuation for lab-on-a-chip applications
Benito-Lopez, Fernando and Byrne, Robert and Răduţă, Ana Maria and Diamond, Dermot (2009) Novel multifunctional materials based on ionic liquids: on demand micro-valve actuation for lab-on-a-chip applications. In: μTAS 2009 - 13th International Conference of Miniaturized Systems for Chemistry and Life Science, Micro Total Analysis Systems, 1-5 November 2009, Jeju, Korea.
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We present the fabrication, characterization and performance as a micro-valve of four novel materials, ionogels, consisting in a polymeric structure with benzospiro-pyran units and phosphonium based ionic liquids. Each inonogel is photopolymerised in the channels of a poly(methyl methacrylate) microfluidic device generating four different micro-valves. The micro-valves are actuated by simply applying local white light irradiation and each of the micro-valves opens specifically at one particular time. Therefore, flows can be independently controlled by one single light source while the synthesis of ionogels with different ionic liquids enables distinct valve ac-tuation. Moreover, the microfluidic device can be reusable many times.
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