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December 18th, 2006
Alloys of iron and cobalt generate powerful magnetic signals that could be useful in nanoparticles designed to detect tumors using magnetic resonance imaging (MRI).
However, naked iron-cobalt nanoparticles turn out to be chemically active materials, making them unsuitable for use in the body, and efforts to add any number of protective coatings have failed to produce biocompatible nanoparticles.
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