Endohedral Silicon Fullerenes SiN (27 ≤ N ≤ 39)
- 1 October 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 126 (42), 13845-13849
- https://doi.org/10.1021/ja046861f
Abstract
We have performed an unbiased search for the lowest-energy geometric structures of medium-sized silicon clusters SiN (27 ≤ N ≤ 39) using a genetic algorithm and nonorthogonal-tight-binding method, followed by a refining and biased search using basin-hopping method coupled with density-functional theory. We show that the carbon fullerene cages are most likely generic cage motifs (“magic cages”) to form low-lying stuffed-cage silicon clusters (beyond the size N > 27). An empirical rule that provides optimal “stuffing/cage” combinations for constructing low-energy endohedral silicon fullerenes is suggested, with a hope that it can provide guidance to future synthesis of “bucky” silicon.Keywords
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