Electrical conductivity enhancement of metallic single-walled carbon nanotube networks by CoO decoration

Do Hyun Kim, Sang Yun Lee, Jun Eon Jin, Gyu-Tae Kim, Dong Jin Lee

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We report that the decoration of metallic single-walled carbon nanotube (m-SWCNT) networks with cobalt(ii) oxide (CoO) can improve the electrical conductivity of the networks. To measure the electrical conductivity, we prepared m-SWCNT networks between the source and drain electrodes of field-effect transistors (FETs). Then, the amount of CoO nanoparticles (NPs) used for decoration was controlled by treating the FETs with different volumes of a solution containing Co(NO3)2·6H2O. Atomic force microscopy imaging showed that CoO NPs were intensively deposited on the intertubular junction of the m-SWCNT networks. X-ray photoelectron spectroscopy confirmed that the oxidation state of the Co element on m-SWCNT was CoO. Raman spectra revealed that heavy decoration of CoO increased the D-band intensity of the m-SWCNT, indicating that the CoO NPs disordered the sp 2 hybridized carbon atoms of the m-SWCNT via decoration. The electrical conductivity of the m-SWCNT networks was enhanced up to 28 times after decoration, and this was attributed to the CoO NPs connecting the m-SWCNTs at junctions of the networks.

Original languageEnglish
Pages (from-to)6980-6985
Number of pages6
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number15
DOIs
Publication statusPublished - 2014 Apr 21

Fingerprint

Electric Conductivity
Carbon Nanotubes
Single-walled carbon nanotubes (SWCN)
carbon nanotubes
electrical resistivity
augmentation
Nanoparticles
nanoparticles
Field effect transistors
field effect transistors
Photoelectron Spectroscopy
cobalt oxides
Atomic Force Microscopy
Cobalt
Oxides
Raman scattering
Atomic force microscopy
Electrodes
Carbon
X ray photoelectron spectroscopy

ASJC Scopus subject areas

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

Cite this

Electrical conductivity enhancement of metallic single-walled carbon nanotube networks by CoO decoration. / Kim, Do Hyun; Lee, Sang Yun; Jin, Jun Eon; Kim, Gyu-Tae; Lee, Dong Jin.

In: Physical Chemistry Chemical Physics, Vol. 16, No. 15, 21.04.2014, p. 6980-6985.

Research output: Contribution to journalArticle

Kim, Do Hyun ; Lee, Sang Yun ; Jin, Jun Eon ; Kim, Gyu-Tae ; Lee, Dong Jin. / Electrical conductivity enhancement of metallic single-walled carbon nanotube networks by CoO decoration. In: Physical Chemistry Chemical Physics. 2014 ; Vol. 16, No. 15. pp. 6980-6985.
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