Korean researchers have created nanoscale lenses with superhigh resolution using a novel self-assembly method. So far, they've demonstrated that the tiny lenses can be used for ultraviolet lithography, for imaging objects too tiny for conventional lenses, and for capturing individual photons from a light-emitting nanostructure called a quantum dot.The limits on the resolution of both light microscopes and the photolithographic instruments used by the semiconductor industry. (source: technologyreview.com)
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