In one of my research projects we pass particles through small microfluidic channels, and on occasion after an experiment I don’t clean up as well as I should. Here are some chips I found lying around that I thought would be cool to image. The small spheres are polystyrene beads, and the solution/precipitate is KCl. For reference, the beads are 10 microns in diameter, or around a tenth of the thickness of a strand of human hair.

Pictures:

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