Growth of Bulk ZnO Single Crystals via a Novel Hydrothermal Oxidative Pressure‐Relief Route
Growth of Bulk ZnO Single Crystals via a Novel Hydrothermal Oxidative Pressure‐Relief Route
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DOI：
10.1002/adfm.200400080
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发表时间：
2005-02
影响因子：
19
通讯作者：
Weiwei Zheng;Fan Guo;Y. Qian
中科院分区：
文献类型：
--
作者：
Weiwei Zheng;Fan Guo;Y. Qian
以金属锌和H2O2为原料，在碱性溶剂中于400 °C下反应20 h，成功地发展了一种新型的水热氧化减压（HOPR）方法生长出高质量的ZnO单晶。X射线粉末衍射显示ZnO晶体具有纤锌矿结构。通过扫描电子显微镜分析，确定了两种典型的形貌的完美的六角锥体和六角棱柱状ZnO单晶，和双向粘合晶体。单晶的平均尺寸为长1.0mm，直径0.2mm。通过改变反应时间和压力释放速度等反应条件，可以得到短的六棱柱形、新型的多边形层状和纳米线ZnO晶体。生长机制是自发成核和自生长过程。这种新颖的HOPR路线为从溶液中获得结晶良好的ZnO块状晶体提供了另一种选择。
A novel hydrothermal oxidative pressure‐relief (HOPR) route has been successfully developed for the growth of high‐quality bulk ZnO single crystals, using metallic zinc and H2O2 as the raw materials, at 400 °C for 20 h in an alkali solvent. X‐ray powder diffraction reveals the ZnO crystals have a wurtzite structure. Two typical morphologies of perfect hexagonal pyramidal and hexagonal prismatic ZnO single crystals, and bidirectional adhesive crystals, are identified by scanning electron microscopy analysis. The average size of the single crystals is ∼ 1.0 mm in length and ∼ 0.2 mm in diameter. Short hexagonal prismatic, novel polygonal layer‐like, and nanowire ZnO crystals are also obtained by altering the reaction conditions, such as the reaction time and the speed of pressure release. The growth mechanism is a spontaneous nucleation and self‐growth process. This novel HOPR route gives an alternative choice for obtaining well‐crystallized ZnO bulk crystals from solution.