Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 55, Issue 18, Pages 5501-5505Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201601016
Keywords
crystallographic control; epitaxial growth; fcc ruthenium; lattice mismatch; nanoparticles
Categories
Funding
- Fundamental Research Funds for the Central Universities [WK2060190043]
- National Natural Science Foundation of China [U1463202, 21541004, 21431003]
- State Key Project of Fundamental Research for Nanoscience and Nanotechnology [2011CB932401, 2011CBA00500]
- National key Basic Research Program of China [2012CB224802]
- Scientific Research Foundation for the Returned Overseas Scholars, Ministry of Education of China
- China Postdoctoral Science Foundation
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Herein, we report an epitaxial-growth-mediated method to grow face-centered cubic (fcc) Ru, which is thermodynamically unfavorable in the bulk form, on the surface of Pd-Cu alloy. Induced by the galvanic replacement between Ru and Pd-Cu alloy, a shape transformation from a Pd-Cu@Ru core-shell to a yolk-shell structure was observed during the epitaxial growth. The successful coating of the unconventional crystallographic structure is critically dependent on the moderate lattice mismatch between the fcc Ru overlayer and PdCu3 alloy substrate. Further, both fcc and hexagonal close packed (hcp) Ru can be selectively grown through varying the lattice spacing of the Pd-Cu substrate. The presented findings provide a new synthetic pathway to control the crystallographic structure of metal nanomaterials.
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