真空度对纳米碳管场发射性能的影响

新型炭材料, 2003, 18(2): 101-105. doi: 10.3969/j.issn.1007-8827.2003.02.004

真空度对纳米碳管场发射性能的影响

佟钰 ^1, , 任文才 ^2, , 赵志刚 ^3, , 刘畅 ^4, , 成会明 ^5,

1.沈阳材料科学国家,联合,实验室,中国科学院金属研究所,辽宁,沈阳,110016;沈阳建筑工程学院,材料科学与工程系,辽宁,沈阳,110015

2.沈阳材料科学国家,联合,实验室,中国科学院金属研究所,辽宁,沈阳,110016

3.沈阳材料科学国家,联合,实验室,中国科学院金属研究所,辽宁,沈阳,110016

4.沈阳材料科学国家,联合,实验室,中国科学院金属研究所,辽宁,沈阳,110016

5.沈阳材料科学国家,联合,实验室,中国科学院金属研究所,辽宁,沈阳,110016

基金项目: 国家自然科学基金(50025204,50202013)

关键词：纳米碳管 , 场发射 , 真空度

Influence of working pressure on the field emission properties of carbon nanotubes

研究了单壁纳米碳管(SWNTs)、双壁纳米碳管(DWNTs)和多壁纳米碳管(MWNTs)在不同真空度下的场发射性能.在超高真空条件下(2.0×10-7Pa),以上三种材料均表现出良好的稳定性;而在高真空条件下(1.0×10-4Pa),三种材料的场发射稳定性有不同程度的下降.通过控制系统真空度在2.0×10-7Pa～1.3×10-3Pa范围内逐渐变化,考察了真空度对纳米碳管场发射性能的影响及其机制,提出适合于SWNTs、DWNTs和MWNTs场发射性能测试和应用的真空度下限分别为6.0×10-5Pa、1.0×10-4Pa和5.7×10-4Pa.

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