Polyaniline nanofiber gas sensors: Examination of response mechanisms

Shabnam Virji; Jiaxing Huang; Richard B. Kaner; Bruce H. Weiller

doi:10.1021/nl035122e

Polyaniline nanofiber gas sensors: Examination of response mechanisms

Shabnam Virji, Jiaxing Huang, Richard B. Kaner^*, Bruce H. Weiller

^*Corresponding author for this work

Materials Science and Engineering

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1082 Scopus citations

Abstract

Using a new interfacial polymerization method for the synthesis of polyaniline nanofibers, we have developed nanofiber sensors and compared them to conventional polyaniline sensors. Five different response mechanisms are explored: acid doping (HCl), base dedoping (NH₃), reduction (with N₂H₄), swelling (with CHCl₃), and polymer chain conformational changes (induced by CH₃OH). In all cases, the polyaniline nanofibers perform better than conventional thin films. Their high surface area, porosity and small diameters enhance diffusion of molecules and dopants into the nanofibers.

Original language	English (US)
Pages (from-to)	491-496
Number of pages	6
Journal	Nano letters
Volume	4
Issue number	3
DOIs	https://doi.org/10.1021/nl035122e
State	Published - Mar 1 2004

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl035122e

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AU - Huang, Jiaxing

AU - Kaner, Richard B.

AU - Weiller, Bruce H.

PY - 2004/3/1

Y1 - 2004/3/1

N2 - Using a new interfacial polymerization method for the synthesis of polyaniline nanofibers, we have developed nanofiber sensors and compared them to conventional polyaniline sensors. Five different response mechanisms are explored: acid doping (HCl), base dedoping (NH3), reduction (with N2H4), swelling (with CHCl3), and polymer chain conformational changes (induced by CH3OH). In all cases, the polyaniline nanofibers perform better than conventional thin films. Their high surface area, porosity and small diameters enhance diffusion of molecules and dopants into the nanofibers.

AB - Using a new interfacial polymerization method for the synthesis of polyaniline nanofibers, we have developed nanofiber sensors and compared them to conventional polyaniline sensors. Five different response mechanisms are explored: acid doping (HCl), base dedoping (NH3), reduction (with N2H4), swelling (with CHCl3), and polymer chain conformational changes (induced by CH3OH). In all cases, the polyaniline nanofibers perform better than conventional thin films. Their high surface area, porosity and small diameters enhance diffusion of molecules and dopants into the nanofibers.

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JO - Nano letters

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Polyaniline nanofiber gas sensors: Examination of response mechanisms

Abstract

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