Stella Marinakos, nanoparticle maker extraordinaire for the Center for the Environmental Implications of NanoTechnology, demonstrates one way to make silver nanoparticles–using borohydride reduction. At its heart, the process is a chemical reaction that causes atoms to clump together until an added stabilizer stops them from growing. But all you’ll see is a change in color, because nanoparticles are less than half the size of the smallest bacteria–much too small to see with the human eye.
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