Kwak Changha, Kim Byung-Hyuk, Park Chang-In, Park Sun-Hong, Seo Soo-Young, Kim Seon-Hyo, Han Sang-Wook
Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea.
J Nanosci Nanotechnol. 2010 Feb;10(2):912-8. doi: 10.1166/jnn.2010.1895.
Uniformly and vertically well-aligned ZnO nanorods were fabricated in-situ and ex-situ on ZnO films using a catalyst-free metal-organic chemical vapor process. Microstructural properties of the initial growth of ZnO nanorods on ZnO films with different surface roughnesses were investigated. We observed that the ZnO nanorods grown on ZnO films with surface roughness of less than 1.0 nm were well-aligned along the c-axis and in the ab-plane. When the nanorods grew on ZnO films with a large surface roughness, they had three different growth directions of 28 degrees, 62 degrees, and 90 degrees to the film surface. The slant angle of 62 degrees corresponds to the angle between the ZnO(001) and (101) planes. The initial growth direction difference caused structural disorder at the interface of the ZnO nanorod and film, and prevented epitaxial growth and the alignment of the nanorods.
采用无催化剂的金属有机化学气相法，在氧化锌薄膜上原位和异位制备了均匀且垂直取向良好的氧化锌纳米棒。研究了在具有不同表面粗糙度的氧化锌薄膜上氧化锌纳米棒初始生长的微观结构特性。我们观察到，生长在表面粗糙度小于1.0纳米的氧化锌薄膜上的氧化锌纳米棒沿c轴和ab面排列良好。当纳米棒生长在具有大表面粗糙度的氧化锌薄膜上时，它们与薄膜表面有28度、62度和90度三种不同的生长方向。62度的倾斜角对应于氧化锌(001)和(101)平面之间的角度。初始生长方向的差异导致了氧化锌纳米棒与薄膜界面处的结构无序，并阻碍了外延生长和纳米棒的取向。
