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the conformal overgrowth of Pd on the Pt nanocubes should be favored. As a result, Pt/Pd bimetallic core/shell cubes were obtained (Figure 8 a). However, the lattice constant of Au (4.08 Å is much larger than that of Pt. The lattice mismatch between Pt and Au is as high as 4.08%, which effectively prevents conformal
overgrowth on the Pt nanocubes, instead giving anisotropic overgrowth of Au on Pt seeds. Consequently, Pt/Au bimetallic heterostructures containing Au rods and a single partially embedded Pt cube at the perimeter of each rod were prepared¡£
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Bimetallic Nanocrystals: Liquid-Phase Synthesis and
Catalytic Applications
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