Polypyrrole Thin Film: Room Temperature Ammonia Gas Sensor

Author

Chougule, M.A. ; Pawar, S.G. ; Patil, S.L. ; Raut, B.T. ; Godse, P.R. ; Sen, Shashwati ; Patil, Vikas B.

Author_Institution

Sch. of Phys. Sci., Solapur Univ., Solapur, India

Volume

11

Issue

9

fYear

2011

Firstpage

2137

Lastpage

2141

Abstract

Polypyrrole thin films were synthesized in situ by chemical polymerization. The morphological studies by Scanning Electron Microscopy showed formation of uniform granular structure with average grain size of 0.6 μm. Fourier transform infrared spectroscopy revealed formation of polypyrrole. The film composition was also characterized by UV-Vis Spectroscopy. These films were investigated for their sensing behavior towards NH₃, C₂H₅OH and CH₃OH gases at room temperature. It has been observed that these films are selective for ammonia gas, and the sensitivity exhibited a linear response in range of 5-100 ppm. These studies show that polypyrrole films can be used as room temperature ammonia sensors.

Keywords

Fourier transform spectra; ammonia; carbon compounds; gas sensors; infrared spectroscopy; polymer films; scanning electron microscopy; ultraviolet spectra; C₂H₅OH; CH₃OH; Fourier transform infrared spectroscopy; NH₃; UV-Vis spectroscopy; chemical polymerization; gas sensor; granular structure; polypyrrole thin film; scanning electron microscopy; size 0.6 mum; temperature 293 K to 298 K; Chemical sensors; Chemicals; Films; Gas detectors; Temperature measurement; Temperature sensors; Ammonia sensor; FTIR; chemical polymerization; polypyrrole;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2011.2112765

Filename

5710956