Polymeric nanowire chemical sensor

Haiqing Liu; Jun Kameoka; David A. Czaplewski; H. G. Craighead

doi:10.1021/nl049826f

Polymeric nanowire chemical sensor

Haiqing Liu, Jun Kameoka, David A. Czaplewski, H. G. Craighead

Houston Methodist

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

707 Scopus citations

Abstract

We have used a nonlithographic deposition process to form single polymeric nanowire chemical sensors. Oriented polyaniline nanowires, with diameters on the order of 100 nm, were deposited on gold electrodes. The devices showed a rapid and reversible resistance change upon exposure to NH₃ gas at concentrations as low as 0.5 ppm. The well-defined single-wire geometry allows for the characterization of the wire material and the device response. The response times of nanowire sensors with various diameters correspond to radius-dependent differences in the diffusion time of ammonia gas into the wires. The nanowire deposition process, utilizing a scanned microfabricated electrospinning source, presents a general method for interfacing polymeric nanowire devices with microfabricated structures.

Original language	English (US)
Pages (from-to)	671-675
Number of pages	5
Journal	Nano Letters
Volume	4
Issue number	4
DOIs	https://doi.org/10.1021/nl049826f
State	Published - Apr 2004

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl049826f

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title = "Polymeric nanowire chemical sensor",

abstract = "We have used a nonlithographic deposition process to form single polymeric nanowire chemical sensors. Oriented polyaniline nanowires, with diameters on the order of 100 nm, were deposited on gold electrodes. The devices showed a rapid and reversible resistance change upon exposure to NH3 gas at concentrations as low as 0.5 ppm. The well-defined single-wire geometry allows for the characterization of the wire material and the device response. The response times of nanowire sensors with various diameters correspond to radius-dependent differences in the diffusion time of ammonia gas into the wires. The nanowire deposition process, utilizing a scanned microfabricated electrospinning source, presents a general method for interfacing polymeric nanowire devices with microfabricated structures.",

author = "Haiqing Liu and Jun Kameoka and Czaplewski, {David A.} and Craighead, {H. G.}",

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AB - We have used a nonlithographic deposition process to form single polymeric nanowire chemical sensors. Oriented polyaniline nanowires, with diameters on the order of 100 nm, were deposited on gold electrodes. The devices showed a rapid and reversible resistance change upon exposure to NH3 gas at concentrations as low as 0.5 ppm. The well-defined single-wire geometry allows for the characterization of the wire material and the device response. The response times of nanowire sensors with various diameters correspond to radius-dependent differences in the diffusion time of ammonia gas into the wires. The nanowire deposition process, utilizing a scanned microfabricated electrospinning source, presents a general method for interfacing polymeric nanowire devices with microfabricated structures.

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Polymeric nanowire chemical sensor

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