ZnO一维纳米结构在金属基底上的原位生长和表征

Synthesis and characterization of one-dimensional ZnO nanostructures directly grown from and on Cu-Zn alloy substrate

以Cu-Zn合金片为基底并提供Zn源,在含氧气氛中通过调控反应温度和氧偏压,采用热氧化法直接在Cu-Zn合金片上大面积可控地合成了多种形貌的ZnO一维纳米材料薄膜(包括纳米带、纳米片、纳米梳和纳米线等),采用多种分析方法对产物的形貌、结构进行了详细的表征,并对其相应的生长模型进行了讨论。结果表明,反应温度和氧偏压对ZnO纳米结构的生长至关重要,随着反应温度升高或氧含量的减少,气相Zn/O物种的偏压比增加,ZnO纳米结构尺寸变小。

A convenient method for the direct and large-area growth of one-dimensional ZnO nanostructures on a conductive Cu-Zn alloy （brass） substrate has been developed, which mainly consists of thermal oxidation of a Cu-Zn alloy foil in the presence of oxygen. Various one-dimensional nanostructures such as nanobelts, nanosheets, nanocombs, and nanowires have been in situ grown on the brass substrate under different reaction temperatures and oxygen partial pressure in Ar/O2, in which the Zn component of ZnO comes from the metallic brass substrate itself. The as-prepared nanostructures are characterized by X-ray diffraction, electron microscopy, X-ray photoelectron spectroscopy, and other modern analysis methods. The growth mechanism is discussed. The results indicate that the reaction temperature and O2 pressure have remarkable influence on the morphology and size of the ZnO crystal, and the crystal size decreases with the increasing temperature or decreasing content of O2.