Shape-Controlled Conversion of β-Sn Nanocrystals into Intermetallic M-Sn (M: Fe, Co, Ni, Pd) Nanocrystals

Autor: Raymond E. Schaak, Nam Hawn Chou
Rok vydání: 2007
Předmět:
Zdroj: ChemInform. 38
ISSN: 1522-2667
0931-7597
DOI: 10.1002/chin.200736212
Popis: The ability to control the shape of metal nanocrystals is critical to applications such as catalysis, magnetism, and plasmonics. Despite significant advances in controlling the shapes of single-metal nanocrystals, rigorous shape control of multimetal nanocrystals remains challenging, and has been limited largely to alloy systems of similar metals. Here we describe a robust strategy that produces shape-controlled intermetallic nanocrystals involving elements of notably different reduction potentials, reduction kinetics, and reactivity. The approach utilizes shape- and size-controlled β-Sn nanocrystals as reactive templates that can be converted into binary M-Sn (M = Fe, Co, Ni, Pd) intermetallic compounds by reaction with appropriate metal salt solutions under reducing conditions. The result, demonstrated in detail for the FeSn2 system, is a variety of nanostructures with morphologies that include spheres, cubes, hollow squares, U-shaped structures, nanorods, and nanorod dimers. Our experiments demonstrate...
Databáze: OpenAIRE
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