Stabilization of gold doped single-walled carbon nanotube film by electropolymerization

Abstract

We report poly(3,4-ethylenedioxythiophene) (PEDOT) as a conducting polymer useful for stabilizing gold chloride (HAuCl 4)-doped single-walled carbon nanotube (SWCNT) film. A specific area was sprayed with SWCNT on a polyethylene terephthalate substrate supported by a slide glass, followed by HAuCl 4 doping. The SWCNT film was electropolymerized with 3,4-ethylenedioxythiophene (EDOT). Transparency of 91 at 550 nm wavelength with 150 Ω/sq of sheet resistance was achieved with this method. Unlike general AuCl 3 doped SWCNT film, the sheet resistance remained stable for up to 4 months. The electropolymerization of PEDOT on the doped film could eliminate the hygroscopic effects through the redox reaction between EDOT and gold chloride salts. © 2012 American Institute of Physics.