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DOI: 10.1039/A905547I (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 3173-3178

SiC–SiOx heterojunctions in nanowires

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Yan Qiu Zhu, Wei Bing Hu, Wen Kuang Hsu, Mauricio Terrones, Nicole Grobert, Jonathan P. Hare, Harold W. Kroto, David R. M. Walton and Humberto Terrones

Abstract

Novel 2-D nanoscale SiC networks have been generated by heating SiC–Fe–Co mixtures under a CO atmosphere. Examination of the products by EDX and HRTEM showed that most of the nanowires consist of β-SiC elongated single crystals, wrapped in amorphous SiOx sheaths. Intriguing crystalline features and defects associated with SiC nanowires were observed. We believe that a binary Fe–Co catalyst is responsible for the SiC network: Fe catalyses the formation of the SiC inner cores and Co the SiOx (x = 1–2) outer shell. A two-step growth mechanism, involving a vapour–liquid–solid (V–L–S) step, is thought to account for SiC nanowire creation.

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