Encapsulating Drops

Building and manipulating drops containing multiple chemicals is useful in pharmaceutical applications. But it can be a challenge to encapsulate multiple fluids without mixing them immediately. The research poster above describes a clever and simple method of building these compound drops. It uses a crosswise array of fibers, as seen in the top image. Dyed water droplets are placed at each intersection, pinning them in place. Then a larger drop of oil is added to the vertical fiber. As it runs down the fiber, it collects and encapsulates the individual droplets, creating the compound drop seen in the bottom photo. (Photo credit: F. Weyer et al.)

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