Electron field emission from carbon nanotubes and undoped nanodiamond

S. G. Wang, Qing Zhang, S. F. Yoon, J. Ahn, D. J. Yang, Q. Wang, Q. Zhou, J. Q. Li

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


In this paper, the electron field emission characteristics of carbon nanotubes (CNTs) and undoped nano-diamond film have been investigated and compared by measuring the electron field emission I-V curve, the emission site density and the emission stability. The CNTs and undoped nano-diamond film were grown in the same microwave plasma enhanced chemical vapor deposition reactor using CH4/H2 and CH4/Ar mixtures, respectively. The morphologies and structures of CNTs and nano-diamond were characterized using field emission scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. The field emission results show that CNTs exhibit a lower threshold electric field of 1.3 V/μm and a much higher emission current density of 1620 μA/cm2 at 2.72 V/μm compared to nano-diamond, which exhibits 3.8 V/μm and 540 μA/cm2 at 6.65 V/μm, respectively. However, CNTs have slightly lower emission stability than the nano-diamond.

Original languageEnglish (US)
Pages (from-to)8-14
Number of pages7
JournalDiamond and Related Materials
Issue number1
StatePublished - Jan 2003
Externally publishedYes


  • Carbon nanotubes
  • Electron field emission
  • Nano-diamond

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering


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