The miracle material known as Graphene, which is a 1 atom thick layer of carbon may soon we able to be printed via 3D Printing technology. American Graphite Technologies has teamed with Kharkov Institute of Physics
to try and produce a 3D Printer capable of printing graphene. Graphene is one of the strongest materials known to man, however it currently is extremely hard to make in large quantities of scale.

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http://gigaom.com/2013/10/10/researc...ints-graphene/