Polyaniline Nanofiber Gas Sensors: Examination of Response Mechanisms

2004/02/19 by Shabnam Virji, Jiaxing Huang, Richard B. Kaner +1 · 11 citations
Chemical Engineering · Engineering · Materials Science · #Analytical Chemistry and Sensors #Conducting polymers and applications #Electrochemical sensors and biosensors

paper · doi:10.1021/nl035122e

openalex publication_date 2004/02/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/22

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 (NH 3 ), reduction (with N 2 H 4 ), swelling (with CHCl 3 ), and polymer chain conformational changes (induced by CH 3 OH). 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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