电介质TiO2粉体增强印刷碳纳米管薄膜的场发射性能  

Improving Field Emission Properties of Screen-printing Carbon Nanotube Film by Dielectric TiO2 Powder

作　　者：商世广[1,2] 刘卫华[2] 

机构地区：[1]西安邮电学院电子工程系,陕西西安710121 [2]西安交通大学电子与信息工程学院,陕西西安710049

出　　处：《纳米科技》2010年第2期26-29,共4页

基　　金：国家自然科学基金资助项目（60801022）; 国家高技术研究发展计划（863计划）重点资助项目（2008AA03A314）

摘　　要：提出了一种可显著改善丝网印刷碳纳米管（CNTs）薄膜场发射特性的浆料制备方法。该方法以乙基纤维素为制浆剂,松油醇为溶剂,通过超声波把CNTs和TiO2粉体均匀地分散成CNTs/TiO2复合浆料,扫描电镜表明,丝网印刷的CNTs/TiO2薄膜在高温下烧结后形成连续的膜体,CNTs被球状的TiO2颗粒均匀隔离;场发射特性测试表明,与单纯的CNTs薄膜相比,CNTs/TiO2薄膜的开启电场降低了0.2V/μm,在电场强度为4.0V/μm时电流密度增加了26.5μA/cm2,结果说明,该方法对于提高CNTs的场发射特性有明显的作用,在CNTs发射显示器的制作中有很好的实际应用价值。A novel paste was prepared to improve the field emission properties of screen-printing carbon nanotube （CNTs） films. Ethyl cellulose was used for pulping agent and terpineol was used for dissolvent. CNTs and TiO2 medium powders were ultrasonically dispersed and formed CNTs/TiO2 composite paste. The scanning electron microscopy images indicate that the screen-printed CNTs/TiO2 paste was formed continuous film after high-temperature sintering, and the CNTs and TiO2 grains were uniformly separated. The field emission measure proves that the turn-on field of the CNTs/ TiO2 film was decreased by 0.2 V/μm, and the field emission current density at the electric field of 4.0 V/μm was increased by 26.5 μA/cm2 as compared with pure CNTs film. The result indicates that the method can improve the ability of CNT field emission effectively, and the technical process has a good utility value in the fabrication of CNTs field emission display.

关 键 词：碳纳米管 场发射 丝网印刷 

分 类 号：TN27[电子电信—物理电子学] O484[理学—固体物理]