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Pure and Applied Chemistry

The Scientific Journal of IUPAC

Ed. by Burrows, Hugh / Weir, Ron / Stohner, Jürgen


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1365-3075
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Vapor-phase synthesis of metallic and intermetallic nanoparticles and nanowires: Magnetic and catalytic properties

Garry Glaspell1 / Victor Abdelsayed1 / Khaled M. Saoud1 / M. Samy El-Shall1

1Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284-2006, USA

Conference

IUPAC Workshop on New Directions in Chemistry - Workshop on Nanostructured Advanced Materials (WAM III), Workshop on Advanced Materials, WAM, Advanced Materials, 3rd, Stellenbosch, South Africa, 2005-09-05–2005-09-09

Citation Information: Pure and Applied Chemistry. Volume 78, Issue 9, Pages 1667–1689, ISSN (Online) 1365-3075, ISSN (Print) 0033-4545, DOI: 10.1351/pac200678091667, January 2009

Publication History

Published Online:
2009-01-01

In this paper, we present several examples of the vapor-phase synthesis of intermetallic and alloy nanoparticles and nanowires, and investigate their magnetic and catalytic properties. In the first example, we report the vapor-phase synthesis of intermetallic aluminide nanoparticles. Specifically, FeAl and NiAl nanoparticles were synthesized via laser vaporization controlled condensation (LVCC) from their bulk powders. The NiAl nanoparticles were found to be paramagnetic at room temperature, with a blocking temperature of approximately 15 K. The FeAl nanoparticles displayed room-temperature ferromagnetism. In the second example, we report the vapor-phase synthesis of cobalt oxide nanoparticle catalysts for low-temperature CO oxidation. The incorporation of Au and Pd nanoparticles into the cobalt oxide support leads to significantly improved catalytic activity and stability of the binary catalyst systems. Finally, we report the synthesis of nanowires of Ge, Mg, Pd, and Pt using the vapor-liquid-solid (VLS) method where the vapor-phase growth of the wire is catalyzed using a proper metal catalyst present in the liquid phase.

Keywords: alloys; catalysis; CO oxidation; intermetallic; LVCC; magnetism; nanoparticles; nanowires; vapor-liquid-solid growth

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