| CNTs-TiO2复合薄膜的场发射及其在电离规中的应用 |
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| 引用本文： | 何凯旋,苏娟,郭等柱,张耿民. CNTs-TiO2复合薄膜的场发射及其在电离规中的应用[J]. 真空电子技术, 2011, 0(5): 37-42 |
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| 作者姓名： | 何凯旋 苏娟 郭等柱 张耿民 |
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| 作者单位： | 北京大学电子系,北京,100871 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 介绍一种制备碳纳米管（CNTs）薄膜的方法—擦涂法。利用这种方法制备了CNTs薄膜以及CNTs-TiO2复合薄膜,对其场发射性能进行了研究,发现CNTs＋（7%～10%（质量比））TiO2复合薄膜的场发射性能与纯CNTs薄膜相比有较大改善,开启电场由2.5V/μm降低到1.3V/μm,阈值电场由4V/μm降低到3.1V/μm,场发射的均匀性与稳定性也有显著的提高。利用CNTs＋7%TiO2薄膜样品作为电离真空规的冷阴极,实现了在2×10-2～3×10-5 Pa范围内的近似线性响应,灵敏度约为3.36Pa-1。这种电离真空规具有体积小、低能耗的特点。
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| 关 键 词： | 碳纳米管 TiO2纳米颗粒 场发射 电离规 |
Field Emission and Their Application in Ionization Gauge of CNTs-TiO2 Films |
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| HE Kai-xuan,SU Juan,GUO Deng-zhu,ZHANG Geng-min. Field Emission and Their Application in Ionization Gauge of CNTs-TiO2 Films[J]. Vacuum Electronics, 2011, 0(5): 37-42 |
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| Authors: | HE Kai-xuan SU Juan GUO Deng-zhu ZHANG Geng-min |
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| Affiliation: | HE Kai-xuan,SU Juan,GUO Deng-zhu,ZHANG Geng-min (Department of Electronic,Peking University,Beijing 100871,China) |
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| Abstract: | We present a simple rubbing method for fabricating films of carbon nanotubes(CNTs) and CNTs-based composite materials.The CNT films and CNTs-TiO2 films are fabricated utilizing this method.The field emission properties of the films are systematically studied in comparison experiments.It is found that,with an optimum proportion(7%~10%)(wt.) of TiO2 nanoparticles mixed with the CNTs,the field emission properties of the composite films could be dramatically improved compared with simplex CNT films,in lowering ... |
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| Keywords: | Carbon nanotubes TiO2 Nanoparticles Field emission Ionization gauge |
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