Electrical conductivity enhancement of metallic single-walled carbon nanotube networks by CoO decoration
- Authors
- Kim, Do-Hyun; Lee, Sang Yun; Jin, Jun Eon; Kim, Gyu Tae; Lee, Dong-Jin
- Issue Date
- 2014
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.16, no.15, pp.6980 - 6985
- Indexed
- SCIE
SCOPUS
- Journal Title
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS
- Volume
- 16
- Number
- 15
- Start Page
- 6980
- End Page
- 6985
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/101149
- DOI
- 10.1039/c3cp55409k
- ISSN
- 1463-9076
- 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)center dot H2O. 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.
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