Abstract
We report, an effective method of purification by dry oxidation and acid treatments of commercial arc discharged single-walled carbon nanotubes (SWNTs) without affecting their pristine structure. Stable dispersion of the purified SWNTs in 1,2-dichlorobenzene is accomplished in the absence of surfactants/polymers at a concentration of 0.1 mg/ml using the ultrasonic process. Fabrication of transparent conducting films from the nanotube dispersed solution on UV/ozone treated flexible substrates, polyethylene naphthalate (PEN) and polyether sulphone (PES) is reported. We produced SWNT films on PEN/PES for sheet resistances 110/100 and 200/193 Ω/sq with 80 and 90% transmittances, respectively, at 550 nm after a post treatment in a mixture of isopropyl alcohol-nitric acid solution. Effective wetting of nanotubes during post treatment enhanced the film conductivity without sacrificing its stability and optical transparency.
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This work was supported by Seoul Research and Business Development program (Grant No. CR070054) and Ministry of Education through BK21 program.
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Manivannan, S., Ryu, J.H., Jang, J. et al. Fabrication and effect of post treatment on flexible single-walled carbon nanotube films. J Mater Sci: Mater Electron 21, 595–602 (2010). https://doi.org/10.1007/s10854-009-9963-7
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DOI: https://doi.org/10.1007/s10854-009-9963-7