They used diamond turning machines to make microscopic copper stairs whose surface roughness surpassed optical qualities and precision metrology to measure sample thickness to 1 billionth of a meter.
Left: Scanning electron microscopy image of the CuNW network on a copper-sprayed surface. Right: Up-close image of CuNW nanowire, which is about 60 nm in diameter, approximately 100x smaller than a ...
Scientists used the National Ignition Facility at Lawrence Livermore National Lab to squeeze a microscopic sample of copper samples under 30 million atmospheres in less than a billionth of a second.
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