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Low-Field Emission from Iron Oxide-Filled Carbon Nanotube Arrays |
| CHAI Yang;YU Li-Gang;WANG Ming-Sheng;ZHANG Qi-Feng;WU Jin-Lei |
| Department of Electronics, Peking University, Beijing 100871 |
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| Cite this article: |
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CHAI Yang, YU Li-Gang, WANG Ming-Sheng et al 2005 Chin. Phys. Lett. 22 911-914 |
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Abstract 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--1.01V/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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61.46.+w
79.70.+q
81.15.Gh
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Published: 01 April 2005
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61.46.+w
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79.70.+q
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(Field emission, ionization, evaporation, and desorption)
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81.15.Gh
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(Chemical vapor deposition (including plasma-enhanced CVD, MOCVD, ALD, etc.))
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