Effect of acid treatment on carbon nanotube-based flexible transparent conducting films
writer：Hong-Zhang Geng, Ki Kang Kim, Kang Pyo So, Young Sil Lee, Youngkyu Chang, Young Hee Lee
keywords：Carbon nanotubes, Transparent conducting films
source：期刊
specific source：Journal of the American Chemical Society. 2007, 129, 7758-7759
Issue time：2007年
The single-walled carbon nanotubes (SWCNTs) were dispersed in deionized water with sodium dodecyl sulfate (SDS) as dispersant. Flexible transparent conducting films (TCFs) were fabricated on poly(ethylene terephthalate) substrate using SWCNT solution by a spray methods. The quality of SWCNTs, the degree of dispersion, film morphology, and the performance of TCFs were characterized and analyzed. The SWCNT films were further immersed in acidic solution to modify the film performance. This process involved a chemical doping and removal of the remaining dispersant on the CNT surface. The sheet resistance of film was reduced and the film conductivity was enhanced by a factor of 4 with a negligible change in the transmittance in the visible range. This enhancement was attributed to the removal of remaining SDS and the subsequent densified film formation to reduce the cross-junction resistance between SWCNT networks and enhanced metallicity of SWCNTs.