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Preparation of Polymer-Covered Metal Nanorods and Metal Microcrystals by Intrinsic Two-Dimensional Crystalline Lattice Templating

Published online by Cambridge University Press:  03 March 2011

Alexandru C. Pavel ,
Dwight K. Romanovicz ,
Miguel J. Yacaman  and
John T. McDevitt
Alexandru C. Pavel
Affiliation:
Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
Dwight K. Romanovicz
Affiliation:
Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165
Miguel J. Yacaman
Affiliation:
Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712-0231; and Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712-1063
John T. McDevitt
Affiliation:
Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, Texas 78712-0165; Center for Nano- and Molecular Science and Technology, University of Texas at Austin, Austin, Texas 78712-1063; and Texas Materials Institute, University of Texas at Austin, Austin, Texas 78712-1063
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Abstract

Two-dimensional layered ceramics, highly anisotropic materials in terms of structure and properties, were used to produce polymer-covered metal nanorods and metal microcrystals. The procedure took advantage of the intrinsic planar, layered ordering of the metal cations suitable to be reduced and could be further used to engineer one-dimensional metal alloy nanostructures by appropriate doping of the initial layered ceramic lattice with suitable cationic species. The procedure involved the formation in an intermediate step of a polymer-intercalated ceramic nanocomposite, highly porous to the diffusion of the polymerizable reducing agent, pyrrole. Two structurally similar layered bismuthates, Bi2Sr2CaCu2O8+δ and Bi6Sr2CaO12 and a partially Rh-substituted ceramic, Bi4Rh2Sr2CaO12 were used as the precursor layered ceramics and the reducible metal cations were Cu2+, Bi3+, and Rh3+, respectively. The formation of the polymer-covered metal nanorods and metal microcrystals took place at relatively high temperatures of reaction (325 °C) and long reaction times (10–12 days).

Keywords

CeramicLayeredSuperconductor
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 11 , November 2005 , pp. 3034 - 3046
Copyright
Copyright © Materials Research Society 2005

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