| 氮离子轰击改善胶体石墨薄膜平面场发射特性的研究 |
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| 引用本文： | 王玮玮,孙辉,于利刚,张耿民.氮离子轰击改善胶体石墨薄膜平面场发射特性的研究[J].北京大学学报(自然科学版),2007,43(3):412-416. |
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| 作者姓名： | 王玮玮 孙辉 于利刚 张耿民 |
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| 作者单位： | 北京大学信息科学技术学院电子学系,北京,100871 |
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| 摘 要： | 研究了氮离子(N )轰击对石墨薄膜场发射特性的影响.片层石墨被N 轰击成较整齐排列的锥尖阵列,尖端密度～108cm -2.XPS谱证实有许多N原子注入薄膜,膜内存在大量sp2杂化轨道键.场发射测试表明,经过N 轰击,整个薄膜在场发射的均匀一致性方面有较明显的改善,场发射电流密度从0.3增大到1.65mA/cm2.
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| 关 键 词： | 氮离子(N ) 溅射轰击 石墨 场发射阵列 |
| 修稿时间： | 2006-04-272006-09-04 |
Improving the Field Emission Properties of a Graphite Paste Film by Nitrogen Ion Bombardment |
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| WANG Weiwei,SUN Hui,YU Ligang,ZHANG Gengmin.Improving the Field Emission Properties of a Graphite Paste Film by Nitrogen Ion Bombardment[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2007,43(3):412-416. |
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| Authors: | WANG Weiwei SUN Hui YU Ligang ZHANG Gengmin |
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| Institution: | Key Laboratory for the Physics and Chemistry of Nanodevices and Department of Electronics, Peking University, Beijing, 100871 |
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| Abstract: | The field emission properties of a graphite paste film were found to have been greatly improved by nitrogen ion bombardment. The bombardment transformed the graphite surface into an array of graphite cones with a - 10^8 cm^-2 tip density. XPS measurement showed that plenty of nitrogen had been injected into the graphite film and there existed a large number of sp2 bonds. Field emission test demonstrated that the distribution of the emission sites in the post-bombardment film was much more dense and uniform than that of the original one. The maximum current density of 1.65 mA/cm^2 was also achieved, which was much higher than that of the pre-treatment sample. |
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| Keywords: | N-ion bombardment graphite field emission array |
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