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Science 20 December 2002:
Vol. 298. no. 5602, p. 2279
DOI: 10.1126/science.298.5602.2279b
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The microporous zeolites oxides are generally insulators, but analogous compounds based on sulfur and selenium that use cations such as In, Ge, and Sn as the central atom instead of Si or Al are semiconductors that could have unusual electronic and photophysical properties. However, nanoporous analogs have often exhibited poor thermal stability that limits their use in applications such as catalysis. Zheng et al. (p. 2366) found that they could achieve high thermal stability (up to at least 380°C) in several different compounds by mixing tetravalent and trivalent cations.




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