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Images of the alloy Ge₃₀Si₇₀ taken with a scanning transmission electron microscope before (left) and after (right) correction for aberration. The IBM-Nion R&D team used a set of 35 electron lens to correct for the aberrations. Picture credit: Nature/IBM/Nion)

Correction: The original caption for this figure was incorrect and was corrected on 27 September 2002.

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