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| 1 | Field emission characteristics of ZnO nanotetrapods and the effect of thermal annealing in hydrogen显示文摘Large-scale tetrapod-like ZnO nanostructures have been synthesized using a thermal chemical vapor deposition method on a silicon substrate. The high-purity nanotetrapods show sharp tips geometry with a wurtzite structure. The field emission properties of the uniform ZnO nanostructural material are investigated at different anode-cathode distances. The turn-on field for the ZnO nanotetrapods is found to be about 3.7 V/μm at a current density of 1 μA/cm2. The field emission behavior obeys Fowler-Nordheim relationship. More importantly,the field emission properties are improved after an-nealing in hydrogen,and therefore high emission current and low turn-on field are obtained. These results indicate that tetrapod-like ZnO nanostructures are a promising candidate for cold cathode emitters. | CHEN HongSheng QI JunJie ZHANG Yue LIAO QingLiang ZHANG XiaoMei HUANG YunHua | 2007 | Chinese Science Bulletin2007，52，9： | 5 |
| 2 | 锰掺杂纳米氧化锌的发光特性显示文摘应用气相传输法,以铜为催化剂,在硅衬底上制备了锰掺杂氧化锌四足纳米晶须。利用X射线与电子衍射谱、扫瞄电镜和高分辨率透射电镜对样品形貌、结构和成份进行表征与检测。通过355 nm与375 nm紫外光激发下掺杂与未掺杂样品光致发光谱的对比,结合拉曼散射谱与光致激发谱,对掺杂样品中光致发光机理进行分析。结果表明,样品由沿[0001]方向生长、前端和内部长有纤细刺状结构的中空六方管组成;样品中掺入的Mn^(2+)的无辐射复合中心作用,是掺杂样品紫外辐射强度和谱宽变小的主要原因,而氧化锌晶体晶格周期对Mn^(2+)中d-d电子跃迁过程的影响,则是375 nm紫外光激发下掺杂样品中产生415 nm辐射峰的主要原因。 | 王马华 朱光平 徐春祥 | 2010 | 光子学报2010，39，1： | 5 |
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