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May 2nd, 2007
Using gold to fight cancer
Abstract:
"When gold is in very small pieces, it is no longer golden … but rather ruby red … or blue … depending on the size," Xia said. "All different colors are possible."
Xia has a rainbow of liquids that he keeps in his office, each containing differently tuned gold particles. The bits in his rainbow vials are nanocages, or gold nanoparticles.
Xia explained that this principle works because "light is an electromagnetic field [and] metal has free electrons." Like the specific reflecting patterns these particles have, there is also similar specificity for the absorption of light for these particles.
Source:
washington.edu
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