期刊
NANOSCALE
卷 2, 期 12, 页码 2647-2651出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0nr00498g
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类别
资金
- NSF [DMR-0830074]
- Welch Foundation [AX-1615]
- CONACYT
- CONICET
- PREM-NSF at UTSA
We report the formation of Au/Co nanoparticles and their characterization by aberration (C-s) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.
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