TY - JOUR
T1 - The Co-Au interface in bimetallic nanoparticles
T2 - A high resolution STEM study
AU - Mayoral, Alvaro
AU - Mejía-Rosales, Sergio
AU - Mariscal, Marcelo M.
AU - Pérez-Tijerina, Eduardo
AU - José-Yacamán, Miguel
PY - 2010/11
Y1 - 2010/11
N2 - We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) 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.
AB - We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) 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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U2 - 10.1039/c0nr00498g
DO - 10.1039/c0nr00498g
M3 - Article
C2 - 20944844
AN - SCOPUS:78649837229
SN - 2040-3364
VL - 2
SP - 2647
EP - 2651
JO - Nanoscale
JF - Nanoscale
IS - 12
ER -