By Peter Weiss
A newly created form of carbon has captured the crown of world’s strongest known material. A team of researchers in Germany and France made the new material using a specialized, multijawed anvil that simultaneously squeezed and heated a powder of all-carbon molecules known as buckyballs.
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At 200,000 times atmospheric pressure and a temperature of 2,500 kelvins, the powder coalesced into an extraordinarily hard, dense, black plug about the size of a poppy seed. Electron microscope images revealed that the new material is composed of randomly arranged diamond needles no more than 20 nanometers wide but up to a micrometer long. Natalia Dubrovinskaia of the University of Bayreuth in Germany and her colleagues describe this material, composed of what they call diamond nanorods, in the Aug. 22 Applied Physics Letters.