Physics – Condensed Matter – Materials Science
Scientific paper
2008-08-23
Nanotechnology 20 (2009) 434014
Physics
Condensed Matter
Materials Science
4 figures 8 pages, add 2 references
Scientific paper
We measured the electronic properties and gas sensing responses of template-grown poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS)-based nanowires. The nanowires have a "striped" structure (gold-PEDOT/PSS-gold), typically 8um long (1um-6um-1um for each section, respectively) and 220 nm in diameter. Single-nanowire devices were contacted by pre-fabricated gold electrodes using dielectrophoretic assembly. A polymer conductivity of 11.5 +/- 0.7 S/cm and a contact resistance of 27.6 +/- 4 kOhm were inferred from measurements of nanowires of varying length and diameter. The nanowire sensors detect a variety of odors, with rapid response and recovery (seconds). The response (R-R0)/R0 varies as a power law with analyte concentration.
Cao Yanyan
Charlie Johnson*† A. T.
Dan Yaping
Evoy Stephane
Mallouk Tom E.
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