Nanofluidic 'multi-tool' separates and sizes nanoparticles

A wrench or a screwdriver of a single size is useful for some jobs, but for a more complicated project, you need a set of tools of different sizes. Following this guiding principle, researchers at the National Institute of Standards and Technology have engineered a nanoscale fluidic device that functions as a miniature "multi-tool" for working with nanoparticles -- objects whose dimensions are measured in nanometers, or billionths of a meter.

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