Dielectrophoretically Assembled Polymer Nanowires for Gas Sensing

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dc.creatorDan, Yaping
dc.creatorCao, Yanyan
dc.creatorMallouk, Tom E.
dc.creatorJohnson, Alan T.
dc.creatorEvoy, Stephane
dc.date2007-02-26
dc.date.accessioned2026-07-07T12:49:30Z
dc.date.available2026-07-07T12:49:30Z
dc.descriptionWe measured the electronic properties and gas sensing response of nanowires containing segments of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS) that were synthesized using anodic aluminum oxide (AAO) membranes. The nanowires have a "striped" structure of gold-PEDOT/PSS-gold and are typically 8 um long (1 um-6 um-1 um for each section, respectively) and 220 nm in diameter. Dielectrophoretic assembly was used to position single nanowires on pre-fabricated gold electrodes. A polymer conductivity of 11.5 +/- 0.7 S/cm and a contact resistance of 27.6 +/- 4 kOhm were inferred from resistance measurements of nanowires of varying length and diameter. When used as gas sensors, the wires showed a resistance change of 10.5%, 9%, and 4% at the saturation vapor pressure of acetone, methanol and ethanol, respectively. Sensor response and recovery were rapid (seconds) with excellent reproducibility in time and across devices. "Striped" template-grown nanowires are thus intriguing candidates for use in electronic nose vapor sensing systems.
dc.description18 pages 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0702619
dc.identifierhttp://arxiv.org/abs/cond-mat/0702619
dc.identifierSENSORS AND ACTUATORS B-CHEMICAL 19 (2007)55-59
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/222423
dc.subjectMaterials Science
dc.titleDielectrophoretically Assembled Polymer Nanowires for Gas Sensing
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