| Low-Field Emission from Iron Oxide-Filled Carbon Nanotube Arrays |
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| 作者姓名： | 柴扬 于利刚 王鸣生 张琦锋 吴锦雷 |
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| 作者单位： | DepartmentofElectronics,PekingUniversity,Beijing100871 |
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| 摘 要： | Arrays of multi-walled carbon nanotubes (MWCNTs) filled with iron oxide have been fabricated by a one-step route based on the pyrolysis of ferrocene under a well-chosen synthesis condition. The MWCNT arrays were observed with a scanning electron microscope, with which an energy dispersive x-ray spectrum (EDXS) was also acquired, and they are analysed by x-ray diffraction. Furthermore, individual MWCNTs were studied by using selected area electron diffraction (SAED) and the EDXS in a transmission electron microscopy observation. All the observation and analysis confirmed that the MWCNTs were filled with iron oxide. Field emission from these arrays of iron oxide-filled MWCNTs was measured and the turn-on field was determined to range from 0.83-1.01 V/μm, appearing to be much lower than those of arrays of pure MWCNTs and arrays of nitrogen-doped MWCNTs fabricated in similar ways. The possible reasons of the observed low-field emission are discussed.
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| 关 键 词： | 碳纳米管 离子氧化阵列 低场发射 高温分解 合成条件 薄膜物理学 |
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