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Synthesis of well-aligned thin multiwalled carbon nanotubes on the silicon substrate and their field emission properties

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2011, 12(4), pp.218-222
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General

Huajun Yuan 1 Dong Hoon Shin 2 김바울 2 이철진 2

1Korea University
2고려대학교

Candidate

ABSTRACT

Well-aligned multi-walled carbon nanotubes (MWCNTs) were successfully synthesized by catalytic chemical vapor deposition using a hydrogen sulfide (H2S) 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. H2S 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/μm at a current density of 0.1 μA/cm2 and a high emission current of about 1.0 mA/cm2 at a bias field of 2.3 V/μm. We suggest a possible growth mechanism for the well-aligned thin MWCNTs with a large inside hollow core.

Citation status

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