Ma Teng, Guo Min, Zhang Mei, Wang Xidong
Department of Physical Chemistry, University of Science and Technology Beijing, Beijing 100083, PR China.
J Nanosci Nanotechnol. 2009 Oct;9(10):5920-6. doi: 10.1166/jnn.2009.1239.
The effect of the texture and the density of ZnO seed layer on the orientation of ZnO nanorod arrays (ZNAs) was systematically investigated, and the vertical growth mechanism of ZNAs during hydrothermal deposition was also explained. It is demonstrated that the textured ZnO seed layer determines the orientation of ZNAs which grow on it. The interaction among nanorods, which derives from the high crystal seed density and the incomplete c-axis texture of ZnO seed layer, obviously reinforces the c-axis texture of ZNAs. According to the seed density behavior of ZnO seed layer, the dominate factor which influences the orientation of ZNAs has been studied. And the results classify the growth situations into three categories: the high density seed layer initiated growth, the middle density seed layer initiated growth and the sparsely separated seeds initiated growth. We also establish the correlation between the density and the orientation of ZNAs, this quasi-quantitative correlation can be used to fabricate the ZNAs with suitable density and orientation.
系统研究了ZnO籽晶层的织构和密度对ZnO纳米棒阵列（ZNAs）取向的影响，并解释了水热沉积过程中ZNAs的垂直生长机制。结果表明，织构化的ZnO籽晶层决定了生长在其上的ZNAs的取向。纳米棒之间的相互作用源于ZnO籽晶层的高晶种密度和不完全的c轴织构，明显增强了ZNAs的c轴织构。根据ZnO籽晶层的籽晶密度行为，研究了影响ZNAs取向的主导因素。结果将生长情况分为三类：高密度籽晶层引发生长、中密度籽晶层引发生长和稀疏分离籽晶引发生长。我们还建立了ZNAs密度与取向之间的相关性，这种准定量相关性可用于制备具有合适密度和取向的ZNAs。
