Physics – Condensed Matter – Materials Science
Scientific paper
2007-02-26
SENSORS AND ACTUATORS B-CHEMICAL 19 (2007)55-59
Physics
Condensed Matter
Materials Science
18 pages 6 figures
Scientific paper
We 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.
Cao Yanyan
Dan Yaping
Evoy Stephane
Johnson Alan T.
Mallouk Tom E.
No associations
LandOfFree
Dielectrophoretically Assembled Polymer Nanowires for Gas Sensing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dielectrophoretically Assembled Polymer Nanowires for Gas Sensing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dielectrophoretically Assembled Polymer Nanowires for Gas Sensing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-206381