Journal
ACS NANO
Volume 3, Issue 3, Pages 714-720Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn800858w
Keywords
transparent film; flexible film; nanotube; conducting polymer; nanocomposite
Categories
Funding
- Science Foundation Ireland [03/CE3/M406s1]
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We have prepared flexible, transparent, and very conducting thin composite films from poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), filled with both arc discharge and HIPCO single-walled nanotubes, at high loading level. The films are of high optical uniformity. The arc discharge nanotube-filled composites were significantly more conductive, demonstrating DC conductivities of > 10(5) S/m for mass fractions > 50 wt %. The ratio of DC to optical conductivity was higher for composites with mass fractions of 55-60 wt % than for nanotube-only films. For an 80 nm thick composite, filled with 60 wt % arc discharge nanotubes, this conductivity ratio was maximized at sigma(DC)/sigma(Op) = 15. This translates into transmittance (550 nm) and sheet resistance of 75 and 80 Omega/square, respectively. These composites were electromechanically very stable, showing < 1% resistance change over 130 bend cycles.
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