中文摘要：

采用脉冲激光沉积技术先在Si（111）衬底上制备Zn薄膜,然后在石英炉中热蒸发金属锌粉的方法制备了ZnO晶须。分别用X射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、高分辨透射电子显微镜（HRTEM）和光致发光（PL）谱对样品的结构、成分、形貌和光学特性进行了表征。结果表明,采用此方法得到的ZnO多角晶须为六方纤锌矿结构,其根部直径大约在100～500nm之间,尖部直径大约为40nm左右,长约几个微米。Zn薄膜能够有效地促使晶核的形成与长大从而促进了ZnO晶须的形成。最后,简单讨论了ZnO纳米晶须的生长机制。

英文摘要：

ZnO multipod whiskers were synthesized on Zn-coated Si（111） substrates by a thermal evaporation oxidation metallic Zn powder method in tube furnace at 900℃.The predeposited Zn films on the substrate were deposited by pulsed laser deposition（PLD）.X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（TEM）,high-resolution transmission electron microscopy（HRTEM） and photoluminescence spectrum（PL） are used to characterize the structure,morphology as well as optical characteristic of the as-synthesized ZnO multipod whiskers.The results reveal that multipod whiskers are pure hexagonal ZnO wurtzite structure with a length of about several microns.The root diameters of the whiskers are in the range of 100-500nm,while the tips have an average diameter about 40nm.The pre-deposited Zn films on the substrates can effectively promote the growth of the ZnO multipod whisker.Finally,the growth mechanism of ZnO multipod whiskers is discussed briefly.