TY - JOUR
T1 - Metal-layer-assisted coalescence of Au nanoparticles and its effect on diameter control in vapor-liquid-solid growth of oxide nanowires
AU - Guo, Dong Lai
AU - Huang, Xiao
AU - Xing, Guo Zhong
AU - Zhang, Zhou
AU - Li, Gong Ping
AU - He, Mi
AU - Zhang, Hua
AU - Chen, Hongyu
AU - Wu, Tom
PY - 2011/1/4
Y1 - 2011/1/4
N2 - By using the Au-catalyzed vapor-liquid-solid growth of ZnO and In2O3 nanowires as examples, we demonstrate the critical role of the coalescence of Au catalyst nanoparticles in determining the final diameter distribution of oxide nanowires. The enhanced coalescence is facilitated by a transient liquid-state metal layer in the initial nucleation stage. The onset and the thickness of this layer are dictated by the metal-vapor pressure and the distance between Au catalyst nanoparticles. Equipped with this insight, we are able to control the diameter of the oxide nanowires by tuning the thickness of the liquid-metal layer and the coalescence of the Au nanoparticles. © 2011 The American Physical Society
AB - By using the Au-catalyzed vapor-liquid-solid growth of ZnO and In2O3 nanowires as examples, we demonstrate the critical role of the coalescence of Au catalyst nanoparticles in determining the final diameter distribution of oxide nanowires. The enhanced coalescence is facilitated by a transient liquid-state metal layer in the initial nucleation stage. The onset and the thickness of this layer are dictated by the metal-vapor pressure and the distance between Au catalyst nanoparticles. Equipped with this insight, we are able to control the diameter of the oxide nanowires by tuning the thickness of the liquid-metal layer and the coalescence of the Au nanoparticles. © 2011 The American Physical Society
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U2 - 10.1103/PhysRevB.83.045403
DO - 10.1103/PhysRevB.83.045403
M3 - RGC 21 - Publication in refereed journal
SN - 1098-0121
VL - 83
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 4
M1 - 045403
ER -