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Laser Sorts Moving Droplets in Lab on a Chip

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A paper by three physicists from Université Bordeaux I in France describes a new and highly effective method of sorting and routing nanolitre droplets flowing through microchannels. The technique will be useful in chemical microreactors and biological assays. These pictures superpose images captured at 100 fps to show the path of 59-μm-radius droplets that are moving at 2.2 mm/s. With no laser light, they head naturally toward the lower outlet. In the bottom picture, the laser switches the water/dye drops to the other outlet. Reprinted with permission from Applied Physics...Read full article

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    Published: June 2008
    EuropeEUROResearchlaser lightlaser switchesMicroscopyradius dropletsResearch & Technology

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