Contact: Jason Socrates Bardi
American Institute of Physics
Caption: This is an optical microscope image of a copper film mostly destroyed during graphene growth. What was a continuous copper film has decomposed into grey areas of bare sapphire, rings and irregular patches of copper that appear in a rainbow of colors due to oxidation, and small star-shaped islands of graphene, which appear bright because the graphene protects the copper from oxidation.
Credit: David L. Miller, NIST
Usage Restrictions: This image may be used only with appropriate caption and credit.
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