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CNx纳米管的制备、结构观察及低场致电子发射性能研究
引用本文:丁 佩,晁明举,梁二军,郭新勇,杜祖亮.CNx纳米管的制备、结构观察及低场致电子发射性能研究[J].物理学报,2004,53(8):2786-2791.
作者姓名:丁 佩  晁明举  梁二军  郭新勇  杜祖亮
作者单位:(1)河南大学特种功能材料实验室,开封 475001; (2)郑州大学物理工程学院,材料物理教育部重点实验室,郑州 450052; (3)郑州航空工业管理学院应用科学系,郑州 450015;郑州大学物理工程学院,材料物理教育部重点实验室,郑州 450052
基金项目:河南省高校创新人才基金(批准号:1999125)和郑州航空工业管理学院青年科研基金资助的课题.
摘    要:采用高温热解法,以乙二胺为前驱液,在沉积有铁催化剂的p型硅(111)基底上制备出了定向生长的CNx纳米管.利用扫描电子显微镜、高分辨率透射电子显微镜和拉曼光谱对CNx纳米管进行了形貌观察和表征.CNx纳米管的高度在20?μm左右,直径在50—100nm之间,具有明显的“竹节状”结构,结晶有序度较差.对CNx纳米管薄膜进行低场致发射性能测试:外加电场为1.4V/μm,观察到20?μA /cm2发射电流,外电场升至2.54V/μm时发射电流达到1.280mA/cm2,在较高外电场下,没有发现电流“饱和”.这比 关键词: CNx纳米管 高温热解 “竹节状”结构 场致发射

关 键 词:CNx纳米管  高温热解  “竹节状”结构  场致发射
文章编号:1000-3290/2004/53(08)/2786-06
收稿时间:2003-10-13
修稿时间:1/9/2004 12:00:00 AM

Synthesis structure observation and low field emission of CNx nanotubes
Ding Pei,Chao Ming-Ju,Liang Er-Jun,Guo Xin-Yong and Du Zu-Liang.Synthesis structure observation and low field emission of CNx nanotubes[J].Acta Physica Sinica,2004,53(8):2786-2791.
Authors:Ding Pei  Chao Ming-Ju  Liang Er-Jun  Guo Xin-Yong and Du Zu-Liang
Abstract:Aligned CNx nanotubes were fabricated by pyrolyzing ethylenediamine on p-type Si(111) substrates deposited by Fe catalysts. Scanning electron microscopy, high-resolution transmission electron microscopy and Raman spectroscopy were used to characterize the CNx nanotubes. The CNx nanotubes about 20μm in length and 50-100?nm in diameter have the “bamboo-like” structure and worse crystallinity. Field emission measurements of the CNx nanotubes indicated that 20μA/cm2 current densities were observed at an electric field of 1.4V/μm,and 1.280mA/cm2 were obtained at 2.54V/μm. No current saturation was found under higher electric field. The CNx nanotubes exhibit better field emission properties than carbon nanotubes and BCN nanotubes that have been grown under same experiment conditions only using different precursor solution. The emission mechanism of CNx nanotubes is also discussed based on their “bamboo-like” structures.
Keywords: CNx nanotubes thermal decomposition “bamboo-like” structure field emission
Keywords:CNx nanotubes  thermal decomposition  “bamboo-like” structure  field emission
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