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Nature 445, 492-493 (1 February 2007) | doi:10.1038/445492a; Published online 31 January 2007
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Materials science: Synergy in a superlattice
James R. Heath1
Abstract
Put two types of crystal together in one lattice, and the resulting material can have properties greater than the sum of those of its individual components. Until now, that's been a difficult trick to pull off on a large scale.
Many applications in materials science require the preparation of crystalline solids that are essentially perfect, only for impurities to be added back into them to achieve a particular physical property. Microelectronics is the obvious example: pure silicon is the foundation of modern integrated circuits, but only by adding atomic impurities (dopants) into the silicon lattice can it be tuned from being an insulator to a semiconductor to a metal.
- James R. Heath is in the Division of Chemistry and Chemical Engineering, Mail Code 127-72, 1200 East California Boulevard, Pasadena, California 91125, USA.
Email: heath@caltech.edu
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