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Korean Carbon Society (한국탄소학회)
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Synthesis of well-aligned thin multiwalled carbon nanotubes on the silicon substrate and their field emission properties

  • Yuan, Huajun (School of Electrical Engineering, Korea University) ;
  • Shin, Dong-Hoon (School of Electrical Engineering, Korea University) ;
  • Kim, Bawl (School of Electrical Engineering, Korea University) ;
  • Lee, Cheol-Jin (School of Electrical Engineering, Korea University)
  • Received : 2011.09.20
  • Accepted : 2011.11.26
  • Published : 2011.12.30
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Abstract

Well-aligned multi-walled carbon nanotubes (MWCNTs) were successfully synthesized by catalytic chemical vapor deposition using a hydrogen sulfide ($H_2S$) additive onto Al/Fe thin film deposited on Si wafers. Transmission electron microscopy images indicated that the as-grown carbon products were thin MWCNTs with small outer diameters of less than 10 nm. $H_2S$ plays a key role in synthesizing thin MWCNTs with a large inside hollow core. The well-aligned thin MWCNTs showed a low turn-on voltage of about 1.1 V/${\mu}m$ at a current density of 0.1 ${\mu}A/cm^2$ and a high emission current of about 1.0 mA/$cm^2$ at a bias field of 2.3 V/${\mu}m$. We suggest a possible growth mechanism for the well-aligned thin MWCNTs with a large inside hollow core.

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References

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