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Doping and De-doping of Carbon Nanotube Transparent Conducting Film by Dispersant and Chemical Treatment
具體來源:J. Mater. Chem. 2008, 18(11), 1261-1266
發(fā)表時間:2008年
Single-walled carbon nanotubes (SWCNTs) dispersed with Nafion in a solvent mixture containing deionized water and 1-propanol (bisolvent) were sprayed on a poly(ethylene terephthalate) substrate to fabricate flexible transparent conducting films (TCFs). Different SWCNT to Nafion ratios were used to optimize the film performance of transparence and sheet resistance. The TCFs were then immersed in nitric acid. These steps resulted in p-type doping due to the presence of Nafion in the SWCNT network and dedoping (removal of doping effect) by the acid treatment. X-ray photoelectron and Raman spectroscopy confirmed that the dedoping effect occurred with the partial removal of Nafion from the nanotube surface by the nitric acid treatment, which improved the film conductivity by a factor of ~ 4 with negligible change in transmittance.
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