Elaboration and characterization of electrochemically prepared H+-doped polyaniline/Au/a-SiC:H-based chemical sensor

In this work, we have elaborated and characterized polyaniline (PANI) thin films doped with sulfuric acid (H 2 SO 4 ) using cyclic voltammetry (CV). The PANI has been electrodeposited onto hydrogenated amorphous silicon carbide (a-SiC:H) films, obtained by DC magnetron sputtering. The structural pro...

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Bibliographic Details
Published in:Journal of solid state electrochemistry 2018-04, Vol.22 (4), p.1123-1130
Main Authors: Talbi, L., Berouaken, M., Khaldi, K., Keffous, A., Gabouze, N., Trari, M., Menari, H., Belkacem, Y.
Format: Article
Language:English
Subjects:
Ammonia
Amorphous materials
Amorphous silicon
Analytical Chemistry
Characterization and Evaluation of Materials
Chemical sensors
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemical analysis
Electrochemical impedance spectroscopy
Electrochemistry
Electron microscopy
Energy Storage
Fourier transforms
Magnetic properties
Magnetron sputtering
Original Paper
Physical Chemistry
Polyanilines
Scanning electron microscopy
Silicon carbide
Spectrum analysis
Sulfuric acid
Thin films
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Summary:In this work, we have elaborated and characterized polyaniline (PANI) thin films doped with sulfuric acid (H 2 SO 4 ) using cyclic voltammetry (CV). The PANI has been electrodeposited onto hydrogenated amorphous silicon carbide (a-SiC:H) films, obtained by DC magnetron sputtering. The structural properties of PANI/Au/a-SiC:H hetero-structure were investigated by the Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The electrochemical properties of PANI-based films were studied by the current (and/or capacity) voltage ( I-V and C-V ) characteristics and electrochemical impedance spectroscopy (EIS). The elaborated hetero-structure has been used for ammonia (NH 3 ) vapor detection. The results showed that the synthesized PANI-H 2 SO 4 thin film exhibited a nanofibrous texture with a good sensitivity to NH 3 vapor. The response and recovery times were 14 and 6 s, respectively, and seem to be a good achievement for the detection of low NH 3 concentrations.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-017-3846-2