Opto-smart systems in microfluidics
Florea, Larisa and Diamond, Dermot and Benito-Lopez, Fernando (2016) Opto-smart systems in microfluidics. In: Zuzuarregui, Ana and Morant-Miñana, Maria Carmen, (eds.) Research Perspectives on Functional Micro- and Nanoscale Coatings. IGI Global, Spain, pp. 265-288. ISBN 9781522500667
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The possibility of using photo-stimulus to control flow in microfluidics devices is very appealing as light can provide contactless stimulation, is biocompatible and can be applied in a non-invasive and highly precise manner. One of the most popular ways to achieve photo-control flow in microfluidic channels is throughout the use of photo-responsive molecules. We review here the different principles and strategies of using photo-responsive molecules to induce or control liquid motion using light, which include the use of photo-controlled polymeric actuators, photo-sensitive coatings, or photo-sensitive surfactants. We further analyse the capability of these approaches to induce flow control throughout the photo-operation of valves, photo-control of electro-osmotic flows or photo-manipulation of discrete microliter-sized droplets.
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