CAMBRIDGE, Mass., Feb. 12 -- Methods for controlling the composition and charge of multiple materials on a single nanostructure are described in a paper in the Feb. 7 issue of Nature, "Growth of Nanowire Superlattice Structures for Nanoscale Photonics and Electronics." Charles Lieber, Nanosys Inc. cofounder and the Mark Hyman Professor of Chemistry at Harvard University and graduate students Mark Gudiksen, Lincoln Lauhon, Jianfang Wang and David Smith wrote the paper, which Nanosys described as landmark research. 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