Materials engineered to be smaller than the wavelength of visible light are finding increasing applications in medicine, engineering, even consumer products like face cream, but no one quite knows what impact they might have on human health. Now researchers at the University of Michigan have come up with a way to test the effects of nanoparticles on human cells, according to the Wired Science blog. They also found that if they coated certain particles with a gel, they could make them less toxic.
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