Electrical percolation characteristics of metallic single-walled carbon nanotube networks by vacancy evolution

Do Hyun Kim, Jun Eon Jin, Mingxing Piao, Jun Hee Choi, Gyu-Tae Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

In the present study, we demonstrate the effect of vacancy evolution on high-pure metallic single-walled carbon nanotube (m-SWCNT) networks by observing the electrical characteristics of the networks on the field-effect transistor (FET). By catalytic oxidation using Co catalyst, vacancy evolution was gradually realized in high-pure m-SWCNT formed as networks between source-drain electrodes of FET. The evolution of vacancy defects in the m-SWCNT networks gradually proceeded by heating FET several times at 250 °C in air. Atomic force microscopic images showed the presence of the Co catalyst nanoparticles, which were evenly formed in the m-SWCNT networks between the electrodes of FET. Vacancy evolution was confirmed by monitoring the D- and G-bands in the Raman spectra measured from the networks after every step of the catalytic oxidation. With vacancy evolution in the networks, the D-band gradually increased, and the transconductance of m-SWCNT networks drastically decreased. In addition, the metallic behaviour of the m-SWCNT networks was converted into a semiconducting one with an on/off ratio of 2.7.

Original languageEnglish
Pages (from-to)18370-18374
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number34
DOIs
Publication statusPublished - 2014 Sep 14

Fingerprint

Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
Vacancies
carbon nanotubes
Field effect transistors
Catalytic oxidation
field effect transistors
Electrodes
Catalysts
Transconductance
Nanoparticles
Heating
Raman scattering
catalysts
oxidation
electrodes
Air
transconductance
Defects
Monitoring

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)

Cite this

Electrical percolation characteristics of metallic single-walled carbon nanotube networks by vacancy evolution. / Kim, Do Hyun; Jin, Jun Eon; Piao, Mingxing; Choi, Jun Hee; Kim, Gyu-Tae.

In: Physical Chemistry Chemical Physics, Vol. 16, No. 34, 14.09.2014, p. 18370-18374.

Research output: Contribution to journalArticle

Kim, Do Hyun ; Jin, Jun Eon ; Piao, Mingxing ; Choi, Jun Hee ; Kim, Gyu-Tae. / Electrical percolation characteristics of metallic single-walled carbon nanotube networks by vacancy evolution. In: Physical Chemistry Chemical Physics. 2014 ; Vol. 16, No. 34. pp. 18370-18374.
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