Growth and Atomistic Mechanisms of Snowflake-like ZnO Islands on curved substrates
ORAL
Abstract
Various snowflake-like patterns are obtained during heretoepitaxial growth of ZnO on Zn-dominant spheres via chemical vapor deposition (CVD). Highly regular and symmetric dendritic patterns of varying compactness can be obtained at different cooling rates. Furthermore, a reduction in the relative concentration of oxygen supply leads to smooth compact islands with sharp or flat tops. The underlying atomistic formation mechanisms of these patterns are investigated using kinetic Monte Carlo simulations. We reproduce the dendritic patterns in the simulations and also propose a plausible mechanism for the growth of the compact patterns with different tops.
*Supported by NNSF, 863 and 973 programs of China, DMSE/USDOE, and USNSF
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Authors
Guo Li
Institute of Physics, Chinese Academy of Sciences; U of Tennessee-Knoxville
Chen Li
Institute of Physics, Chinese Academy of Sciences
Chengmin Shen
Institute of Physics, Chinese Academy of Sciences
Chao Hui
Institute of Physics, Chinese Academy of Sciences
Jifa Tian
Institute of Physics, Chinese Academy of Sciences
Shixuan Du
Institute of Physics, Chinese Academy of Sciences
Hong-Jun Gao
Institute of Physics, Chinese Academy of Sciences
Zhenyu Zhang
Oak Ridge National Laboratory, U of Tennessee-Knoxville
Oak Ridge National Laboratory
Oak Ridge National Laboratory \& The Univeristy of Tennessee
Oak Ridge National Laboratory \& University of Tennessee
Oak Ridge National Laboratory, University of Tennessee-Knoxville
Oak Ridge National Laboratory and University of Tennessee
