Low-field emission from iron oxide-filled carbon nanotube arrays

Yang Chai, Li Gang Yu, Ming Sheng Wang, Qi Feng Zhang, Jin Lei Wu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

14 Citations (Scopus)

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 0.83-1.01 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.
Original languageEnglish
Pages (from-to)911-914
Number of pages4
JournalChinese Physics Letters
Volume22
Issue number4
DOIs
Publication statusPublished - 1 Apr 2005
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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