Improved conductivity of transparent single-wall carbon nanotube thin films via stable postdeposition functionalization

A simple postdeposition method for improving the conductivity of transparent and conducting single-wall carbon nanotube (SWNT) thin films via exposure to nitric acid and thionyl chloride is reported. A systematic study on a range of films of variable density and from different commercial sources of SWNTs is performed. The functionalized films possess sheet resistances as low as that of indium tin oxide (ITO) (similar to 30 Omega/square) albeit at lower transmittance (similar to 50%). At 80 +/- 5% transmittance, the functionalized films have resistance values ranging from 150 to 300 Omega/square. The SWNT films, however, are more flexible than ITO. The stability of the functionalized films upon annealing and processing in solvents (water, methanol, and chloroform) is also reported. (c) 2007 American Institute of Physics.

报道了一种通过暴露于硝酸和亚硫酰氯来提高透明导电单壁碳纳米管（SWNT）薄膜导电性的简易后沉积方法。对一系列不同密度以及来自不同商业来源的单壁碳纳米管薄膜进行了系统研究。功能化薄膜的方块电阻低至与氧化铟锡（ITO）相当（约30Ω/□），尽管其透光率较低（约50%）。在透光率为80±5%时，功能化薄膜的电阻值在150 - 300Ω/□之间。然而，单壁碳纳米管薄膜比ITO更具柔韧性。还报道了功能化薄膜在退火以及在溶剂（水、甲醇和氯仿）中处理后的稳定性。（c）2007美国物理学会