volume 455, issue 7213, P569-569 2008
DOI: 10.1038/455569d
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Abstract: , and his colleagues. They pushed islands of the element antimony across a graphite surface using the tip of an atomic-force microscope. Some of the particles encountered frictional resistance proportional to their area of contact with the surface; others slid almost friction-free. The latter state, called superlubricity, has been argued to arise from a mismatch between the atomic-scale corrugations of two surfaces, which, in theory, should be the norm for solids. Schirmeisen and his team conclude that lubrici…

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