Gas sensing properties of single conducting polymer nanowires and the effect of temperature

Yaping Dan; Yanyan Cao; Tom E. Mallouk; Stephane Evoy; A. T.Charlie Johnson

doi:10.1088/0957-4484/20/43/434014

Gas sensing properties of single conducting polymer nanowires and the effect of temperature

Yaping Dan, Yanyan Cao, Tom E. Mallouk, Stephane Evoy, A. T.Charlie Johnson

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

We measured the electronic properties and gas sensing responses of template-grown poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS)-based nanowires. The nanowires had a 'striped' structure (gold-PEDOT/PSS-gold), and were typically 8νm long (1νm-6νm-1νm for the sections, respectively) and 220nm in diameter. Single-nanowire devices were contacted with pre-fabricated gold electrodes using dielectrophoretic assembly. Apolymer conductivity of 11.5 0.7Scm^-1 and a contact resistance of 27.6 4kΩ were inferred from measurements on nanowires of varying length and diameter. The nanowire sensors detected a variety of odors, with rapid response and recovery (seconds). The response (ΔR/R) varied as a power law with analyte concentration. The power law exponent was found to increase with the molecular weight of the analyte and as a function of temperature. The detection limits are set by noise intrinsic to the device and are at the ppm level even for very volatile analytes.

Original language	English (US)
Article number	434014
Journal	Nanotechnology
Volume	20
Issue number	43
DOIs	https://doi.org/10.1088/0957-4484/20/43/434014
State	Published - 2009

All Science Journal Classification (ASJC) codes

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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title = "Gas sensing properties of single conducting polymer nanowires and the effect of temperature",

abstract = "We measured the electronic properties and gas sensing responses of template-grown poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS)-based nanowires. The nanowires had a 'striped' structure (gold-PEDOT/PSS-gold), and were typically 8νm long (1νm-6νm-1νm for the sections, respectively) and 220nm in diameter. Single-nanowire devices were contacted with pre-fabricated gold electrodes using dielectrophoretic assembly. Apolymer conductivity of 11.5 0.7Scm-1 and a contact resistance of 27.6 4kΩ were inferred from measurements on nanowires of varying length and diameter. The nanowire sensors detected a variety of odors, with rapid response and recovery (seconds). The response (ΔR/R) varied as a power law with analyte concentration. The power law exponent was found to increase with the molecular weight of the analyte and as a function of temperature. The detection limits are set by noise intrinsic to the device and are at the ppm level even for very volatile analytes.",

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AU - Cao, Yanyan

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AU - Evoy, Stephane

AU - Johnson, A. T.Charlie

PY - 2009

Y1 - 2009

N2 - We measured the electronic properties and gas sensing responses of template-grown poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS)-based nanowires. The nanowires had a 'striped' structure (gold-PEDOT/PSS-gold), and were typically 8νm long (1νm-6νm-1νm for the sections, respectively) and 220nm in diameter. Single-nanowire devices were contacted with pre-fabricated gold electrodes using dielectrophoretic assembly. Apolymer conductivity of 11.5 0.7Scm-1 and a contact resistance of 27.6 4kΩ were inferred from measurements on nanowires of varying length and diameter. The nanowire sensors detected a variety of odors, with rapid response and recovery (seconds). The response (ΔR/R) varied as a power law with analyte concentration. The power law exponent was found to increase with the molecular weight of the analyte and as a function of temperature. The detection limits are set by noise intrinsic to the device and are at the ppm level even for very volatile analytes.

AB - We measured the electronic properties and gas sensing responses of template-grown poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT/PSS)-based nanowires. The nanowires had a 'striped' structure (gold-PEDOT/PSS-gold), and were typically 8νm long (1νm-6νm-1νm for the sections, respectively) and 220nm in diameter. Single-nanowire devices were contacted with pre-fabricated gold electrodes using dielectrophoretic assembly. Apolymer conductivity of 11.5 0.7Scm-1 and a contact resistance of 27.6 4kΩ were inferred from measurements on nanowires of varying length and diameter. The nanowire sensors detected a variety of odors, with rapid response and recovery (seconds). The response (ΔR/R) varied as a power law with analyte concentration. The power law exponent was found to increase with the molecular weight of the analyte and as a function of temperature. The detection limits are set by noise intrinsic to the device and are at the ppm level even for very volatile analytes.

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Gas sensing properties of single conducting polymer nanowires and the effect of temperature

Abstract

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