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Abstract
Influence of oxygen on the field emission of singlewalled carbon nanotubes (SWCNTs) was studied using a fieldemission microscope (FEM) and a quadrupole mass spectrometer. After heat treatment at 1000℃, the field emission of clean SWCNTs occurred. Then oxygen was introduced into the vacuum system and the curves of field emission current versus anodecathode voltage (IV curves) were acquired after oxygen adsorption and desorption, respectively. We have observed that oxygen adsorption on SWCNTs leads to a decrease in field emission current, indicating an increase in the work function. Oxidation etching occurred when the SWCNTs were annealed at about 1000℃ under a pressure of 10-4Pa, and the corresponding changes were observed in both field emission images and IV curves.

Keywords:
singlewalled carbon nanotube/

field emission microscope/

field emission/

quadrupole mass spectrometer
Authors and contacts
Zhang Zhao-Xiang¹,

Zhang Geng-Min¹,

Hou Shi-Min¹,

Zhang Hao¹,

Gu Zhen-Nan²,

Liu Wei-Min¹,

Zhao Xing-Yu¹,

Xue Zeng-Quan¹
References

Cited By

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Vol. 52, Issue 5 - 2003-03-05

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