Selective silencing of the electrical properties of metallic single-walled carbon nanotubes by 4-nitrobenzenediazonium tetrafluoroborate
Wang C., Xu W., Zhao J., Lin J., Chen Z., Cui Z.
Asimple and scalablemethod 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. © Springer Science+Business Media New York 2013.