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IJEMS Vol.16(5) [October 2009] >


Title: Charge transport and ammonia sensing response in poly (aniline-co-1-amino- 2-naphthol-4-sulphonic acid)
Authors: Bansal, Vineet
Bansal, M C
Dhawan, S K
Keywords: Conducting polymer
Polyaniline
Copolymer
Nanotubes
Scanning electron microscopy
Charge transport
Issue Date: Oct-2009
Publisher: CSIR
Abstract: The paper reports the synthesis of tubes of poly (aniline-co-1-amino-2-naphthol-4-sulphonic acid) using para toluene sulphonic acid as a dopant. The copolymers have the conductivity of the order of 0.348 S/cm to 0.198 S/cm depending on the ratio of the co-monomers present in the feed ratio. The morphology of the copolymers was studied by scanning electron microscope. Electrical conduction have been studied in the temperature range from 300 K to 30 K. Charge transport has been attributed as tunnelling in the range 30 K to 70 K. Above 70 K, charge transport is represented by Mott’s three-dimensional variable hopping. The copolymer has been found to be a better ammonia vapour sensing material and can be used for detection for varying concentration.
Page(s): 355-363
ISSN: 0975-1017 (Online); 0971-4588 (Print)
Source:IJEMS Vol.16(5) [October 2009]

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