Friday, August 23, 2013

Romans Used Nanoparticules to Make Color-Changing Goblets

The Romans may have first come across the colorful potential of nanoparticles by accident but they seem to have perfected it.

Those clever Romans: they used nanoparticles of silver and gold to make jade-green cups that turn red when lit from behind. Hat tip to Eric Ederer.

Smithsonian Article

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