TY - JOUR
T1 - Structure and shape transformation from multiply twinned particles to epitaxial nanocrystals
T2 - Importance of interface on the structure of Ag nanoparticles
AU - Li, B. Q.
AU - Zuo, J. M.
PY - 2005/8/15
Y1 - 2005/8/15
N2 - The effect of a substrate on the structure of nanometer-sized metal particles was investigated for Ag on silicon surfaces by using high-resolution transmission electron microscope and electron diffraction. The nanometer-sized Ag particles, formed by the vapor deposition of Ag on (001) hydrogen-terminated Si (H-Si) surfaces at room temperature, adopt multiply twinned structures. Upon annealing, the multiply twinned Ag nanoparticles on H-Si (001) transform into fcc nanocrystals. The fcc Ag takes up the cube-on-cube epitaxy, with the orientation relationship of Ag(001) Si(001) and Ag[110] Si[110]. An energetic model is developed to account for the structure and shape transition of supported multiply twinned particles to fcc epitaxial nanocrystals. Possible transition mechanisms are discussed.
AB - The effect of a substrate on the structure of nanometer-sized metal particles was investigated for Ag on silicon surfaces by using high-resolution transmission electron microscope and electron diffraction. The nanometer-sized Ag particles, formed by the vapor deposition of Ag on (001) hydrogen-terminated Si (H-Si) surfaces at room temperature, adopt multiply twinned structures. Upon annealing, the multiply twinned Ag nanoparticles on H-Si (001) transform into fcc nanocrystals. The fcc Ag takes up the cube-on-cube epitaxy, with the orientation relationship of Ag(001) Si(001) and Ag[110] Si[110]. An energetic model is developed to account for the structure and shape transition of supported multiply twinned particles to fcc epitaxial nanocrystals. Possible transition mechanisms are discussed.
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U2 - 10.1103/PhysRevB.72.085434
DO - 10.1103/PhysRevB.72.085434
M3 - Article
AN - SCOPUS:33749233566
SN - 1098-0121
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 8
M1 - 085434
ER -