The dynamic observation of the field emission site of electrons on a carbon nanotube tip

Toru Kuzumaki*, Yasuhiro Horiike, Tokushi Kizuka, Takayuki Kona, Chuhei Oshima, Yoshitaka Mitsuda


研究成果: Article査読

22 被引用数 (Scopus)


A carbon nanotube (CNT) tip in an electric field was dynamically observed at an atomic scale. The field emission site of electrons was investigated by using a field ion microscope (FIM) and a field emission microscope (FEM). In-situ transmission electron microscope observations demonstrated that the CNT tip was deformed by bending the outer layers during field emission. The deformation process resulted in the formation of a nanoscale protrusion as an emission site at the CNT tip. The deformation mechanism can be explained by the reconstruction of carbon atoms. The high electric field that was concentrated in the vicinity of the pentagonal carbon rings on the CNT tip and the electrical attraction caused by applying the bias voltage between electrodes may have contributed to the formation of the protrusion. The atomic structural observations by FIM and FEM indicated that electrons were emitted from the nanoscale protrusion on the carbon network, rather than from the pentagonal carbon ring. The formation of the emission site contributed to the excellent field emission characteristics of the CNT. However, the structural change can be considered as damage caused to the CNT by the high electric field.

ジャーナルDiamond and Related Materials
出版ステータスPublished - 2004 10月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 材料化学
  • 表面、皮膜および薄膜
  • 表面および界面


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