ZnO-Ni壳核丝状阴极的制备及其场发射性能研究  

The Fabrication and Field Emission Properties of ZnO-Ni Lemalle-nucleus Linear Cathodes

作　　者：苏艺菁[1] 胡利勤[1] 郑旭丹[1] 许亚红[1] 郭太良[1] 

机构地区：[1]福州大学物理与信息工程学院,福州350002

出　　处：《光电子技术》2010年第2期80-83,共4页Optoelectronic Technology

基　　金：国家863计划重大专项(2008AA03A313);福建省科技重大专项专题(2004HZ01-2);福建省教育厅资助项目(JA09003);福建省自然科学基金资助项目(2009J05145)

摘　　要：采用水热法在金属镍(Ni)丝表面生长氧化锌(ZnO)纳米材料。通过改变生长条件,制备出花状、锥状、管状、棒状四种形貌的ZnO-Ni壳核丝状阴极。采用扫描电子显微镜(SEM)观察所制备丝状阴极的表面形貌,采用X射线衍射(XRD)分析仪进行物相分析,结果表明所生长的纳米ZnO具有(002)晶面择优取向。测试比较了这四种形貌ZnO-Ni壳核丝状阴极的场发射性能,结果表明管状ZnO纳米材料能较好地改善阴极表面的微观形貌,提高了阴极的场增强效应。Nanomaterials of zinc oxide（ZnO） were fabricated on the surface of nickel metal wires by hydrothermal method. By changing the hydrothermal parameters, ZnO-Ni lemalle-nu- cleus linear cathodes with different morphologies of ZnO nanocrystals were fabricated, including flower-shaped, conical, tubular and rod-like. The surface morphology and crystal structure of linear cathodes were analysized by different techniques, such as SEM and XRD, after which the field emission properties were measured and ent surface morphologies. It was found that mission property of the Ni cathode. compared among ZnO-Ni linear cathodes with differtubular ZnO is more suitable to improve the field emission property of the Ni cathode.

关 键 词：水热法 氧化锌 丝状阴极 场发射 

分 类 号：TN304.21[电子电信—物理电子学]