Setting droplets on a one-way street has huge implications

By creating specific kinds of tiny structures on a material’s surface MIT researchers have made a liquid spread only in a single direction. While this may not appear to be a momentous breakthrough it has important implications for a wide variety of technologies, including micro-arrays for medical research, inkjet printers and digital lab-on-a-chip systems. Up until now the designers of such devices could only control how much the liquid would spread out over a surface, not which way it would go. This new system changes that.

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