Investigation on chemical etching process of ZnO nanorods toward nanotubes
Investigation on chemical etching process of ZnO nanorods toward nanotubes
复制标题
DOI：
10.1016/j.jallcom.2009.03.013
复制
发表时间：
2009-07-29
影响因子：
6.2
通讯作者：
Yu, Weidong
中科院分区：
文献类型：
--
作者：
Gan, Xiaoyan;Li, Xiaomin;Yu, Weidong
采用简单、快速的化学蚀刻工艺，在ito涂层玻璃基板上制备了高密度垂直排列的ZnO纳米管阵列。制备的纳米管为单晶，横截面为六方，直径约为400 nm，中心孔均匀。该ZnO纳米管阵列在室温下表现出较强的372 nm紫外发射，但与缺陷相关的可见光发射可以忽略不计，表明其结晶度高，光学质量优异。根据亚稳富锌（0 0 1）极性面的选择性溶解来解释纳米管的形成。结果表明，ZnO纳米棒的直径对纳米管的形成起关键作用。(C) 2009 Elsevier B.V.版权所有
High-density vertically aligned ZnO nanotube arrays were prepared on ITO-coated glass substrates by a simple and facile chemical etching process from electrodeposited ZnO nanorods. The as-prepared nanotubes are single crystal, with hexagonal cross-section, a diameter of about 400 nm and a uniform central pore. Such ZnO nanotube arrays exhibited strong ultraviolet emissions at 372 nm at room temperature but negligibly defect-related visible emissions, indicating their high crystallinity and excellent optical quality. The nanotube formation was rationalized in terms of selective dissolution of the metastable Zn-rich (0 0 1) polar face. It was proposed that the diameters of the ZnO nanorods played a key role in the nanotube formation. (C) 2009 Elsevier B.V. All rights reserved.