Selective silencing of the electrical properties of metallic single-walled carbon nanotubes by 4-nitrobenzenediazonium tetrafluoroborate
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- Wang, C., Xu, W., Zhao, J. et al. J Mater Sci (2014) 49: 2054. doi:10.1007/s10853-013-7895-3
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A simple and scalable method has been developed to preferentially eliminate metallic species in several commercial single-walled carbon nanotubes (SWCNTs), such as CoMoCAT 65, CoMoCAT 76, CG 200, HiPco, and arc discharge (P2) SWCNTs, using 4-nitrobenzenediazonium salts by tuning the types and concentrations of surfactants in aqueous solutions. The selectivity in commonly used surfactant solutions was confirmed by ultra violet-visible-near infrared spectra, Raman spectra and electrical characterization. Good-performance printed thin-film transistors (TFTs) were obtained by inkjet printing. The printed TFTs exhibited excellent electrical properties with effective mobility and on/off ratio upto 3.54 cm2 V−1 s−1 and 3 × 105, respectively. This method does not require complicated reaction conditions and tedious purification procedure, therefore, promises low-cost production of high-performance printed TFT devices for electronic applications.