Transparent, Flexible, and Highly Conductive Thin Films Based on Polymer−Nanotube Composites

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• 作者：Sukanta De ; Philip E. Lyons ; Sophie Sorel ; Evelyn M. Doherty ; Paul J. King ; Werner J. Blau ; Peter N. Nirmalraj ; John J. Boland ; Vittorio Scardaci ; Jerome Joimel ; Jonathan N. Coleman
• 刊名：ACS Nano
• 出版年：2009
• 出版时间：March 24, 2009
• 年：2009
• 卷：3
• 期：3
• 页码：714-720
• 全文大小：387K
• 年卷期：0
• ISSN：1936-086X

文摘

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 >10⁵ 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 σ_DC/σ_Op = 15. This translates into transmittance (550 nm) and sheet resistance of 75 and 80 Ω/◻, respectively. These composites were electromechanically very stable, showing <1% resistance change over 130 bend cycles.