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Science 18 April 1997:
Vol. 276. no. 5311, pp. 373 - 374
DOI: 10.1126/science.276.5311.373
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Perspectives

Chemistry: Metastable Dense Semiconductor Phases

Louis Brus

The creation of new materials may be possible by searching out high-energy forms of solid-state structures. In his Perspective, Brus discusses results reported in the same issue by Chen et al. on direct measurements of structural changes in nanocrystals. The measurements show that metastable higher-energy forms are more stable in larger nanocrystals, suggesting that it may be possible to "trap" these useful but otherwise unstable structures.

The author is in the Department of Chemistry, Columbia University, New York, NY 10027, USA. E-mail: brus{at}chem.columbia.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)