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Rational synthesis of heterostructured nanoparticles with morphology control.

Rational synthesis of heterostructured nanoparticles with morphology control.

Authors :
Wang C
Tian W
Ding Y
Ma YQ
Wang ZL
Markovic NM
Stamenkovic VR
Daimon H
Sun S
Source :
Journal of the American Chemical Society [J Am Chem Soc] 2010 May 12; Vol. 132 (18), pp. 6524-9.
Publication Year :
2010

Abstract

Rational synthesis of Pt-Au(n) nanoparticles (NPs) has been achieved by overgrowing Au on Pt with n, the number of Pt-Au heterojunctions in each particle, controlled from 1 to 4, and the corresponding NPs in pear-, peanut-, or clover-like morphology. Monte Carlo simulation reveals that the morphology control can be correlated to a thermodynamic equilibrium of the Au coherence energy, the overall particle surface energy, and the heterogeneous Pt-Au interfacial energy in the composite system, which is manipulated by the seeding particle size and solvent polarity. The developed synthetic strategy together with the provided fundamental understanding of heterogeneous nucleation and heterostructure growth could have great potential toward the rational synthesis of composite nanomaterials with morphology control for advanced catalytic and other functional applications.

Details

Language :
English
ISSN :
1520-5126
Volume :
132
Issue :
18
Database :
MEDLINE
Journal :
Journal of the American Chemical Society
Publication Type :
Academic Journal
Accession number :
20397665
Full Text :
https://doi.org/10.1021/ja101305x