Journal ArticleDOI
Polyaniline Nanofiber Gas Sensors: Examination of Response Mechanisms
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TLDR
In this article, a new interfacial polymerization method for the synthesis of polyaniline nanofibers was used and compared with conventional polyanile sensors, and five different response mechanisms were explored: acid doping (HCl), base dedoping (NH3), reduction (with N2H4), swelling (with CHCl3), and polymer chain conformational changes (induced by CH3OH).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.read more
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Gas Sensors Based on Conducting Polymers
Hua Bai,Gaoquan Shi +1 more
TL;DR: In this article, a review of gas sensors fabricated by using conducting polymers such as polyaniline (PAni), polypyrrole (PPy) and poly (3,4-ethylenedioxythiophene) (PEDOT) as the active layers has been reviewed.
Journal ArticleDOI
A review on nanomaterials for environmental remediation
TL;DR: Nanomaterials in various shapes/morphologies, such as nanoparticles, tubes, wires, fibres etc., function as adsorbents and catalysts and their composites with polymers are used for the detection and removal of gases (SO2, CO, NOx, etc.), contaminated chemicals (arsenic, iron, manganese, nitrate, heavy metals, etc.).
Journal ArticleDOI
Nanostructured Materials for Room-Temperature Gas Sensors
TL;DR: The most important advances with regard to fundamental research, sensing mechanisms, and application of nanostructured materials for room-temperature conductometric sensor devices are reviewed here and particular emphasis is given to the relation between the nanostructure and sensor properties in an attempt to address structure-property correlations.
Journal ArticleDOI
Polyaniline nanofibers: a unique polymer nanostructure for versatile applications.
TL;DR: It is demonstrated that high-quality nanofibers can be readily produced in bulk quantity using the conventional chemical oxidative polymerization of aniline, and a range of new useful functionalities are developed.
Journal ArticleDOI
Conducting polymers in chemical sensors and arrays
TL;DR: The review covers main applications of conducting polymers in chemical sensors and biosensors, such as pH sensitivity, sensitivity to inorganic ions and organic molecules as well as sensitivity to gases, and induced receptor properties.
References
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Journal ArticleDOI
Conducting polymers in electronic chemical sensors.
Jiri Janata,Mira Josowicz +1 more
TL;DR: The aim here is to discuss the usability of conducting polymers in both types of electronic applications in light of these two parameters: conductivity and work function.
Journal ArticleDOI
Template Synthesis of Electronically Conductive Polymer Nanostructures
TL;DR: In this article, the template synthesis of electronically conductive polymer nanostructures has been studied and shown to have interesting and unusual electronic properties and provide an opportunity for exploring how molecular and supermolecular structure affect conductivity in conductive polymers.
Journal ArticleDOI
Electrostatically-generated nanofibers of electronic polymers
Alan G. MacDiarmid,Wayne E. Jones,Ian D. Norris,J. Gao,Alan T. Johnson,Nicholas J. Pinto,James Hone,B. Han,Frank Ko,Hidenori Okuzaki,M. C. Llaguno +10 more
TL;DR: In this article, the conductivity/temperature relationship of single fibers as small as 419 nm have been obtained, in a given preparation of certain polymers, such as polystyrene and polyethylene oxide.
Journal ArticleDOI
Ammonia sensors based on sensitive polyaniline films
TL;DR: In this paper, a new type of ammonia sensor with polyaniline (electroconducting polymer) as the sensitive element is proposed, which is characterized by high sensitivity, wide range of measured concentrations and high stability of electrical parameters.
Journal ArticleDOI
Chloroform vapour sensor based on copper/polyaniline nanocomposite
TL;DR: In this paper, a chloroform sensor for ppm level vapour concentration was used in terms of increase in dc electric resistance on exposure to chloromethane vapours, and the FT-IR spectra of nanocomposite showed remarkable modifications in the far IR region indicating the interaction of chlorobars with metal clusters.