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AuthorThomas, Deepu
AuthorThomas, Ajith
AuthorTom, Anju Elsa
AuthorSadasivuni, Kishor Kumar
AuthorPonnamma, Deepalekshmi
AuthorGoutham, Solleti
AuthorCabibihan, John-John
AuthorVenkateswara Rao, Kalagadda
Available date2020-11-12T07:55:57Z
Publication Date2017
Publication NameSynthetic Metals
ResourceScopus
ISSN3796779
URIhttp://dx.doi.org/10.1016/j.synthmet.2017.08.006
URIhttp://hdl.handle.net/10576/16974
AbstractZinc oxide (ZnO) nano-polycrystalline thin films has been prepared by cost-effective microwave assisted successive ionic layer adsorption and reaction (mSILAR) technique. ZnO/PANI prepared by in situ polymerization technique and thin films were fabricated using spin coating. X-ray Diffraction analysis confirms the presence of hexagonal wurtzite ZnO structure in the ZnO/PANI composite. The field emission scanning electron microscope revealed the porous nature of ZnO/PANI films with nanosized grains. We observed PANI intensively affected the structural and electrical properties of ZnO films. The examination of sensors was carried out in the liquefied petroleum gas (LPG) concentration range of 30 to 450 ppm. It was noticed that ZnO/PANI nanocomposite film possesses excellent LPG sensing properties at a room temperature compared with other volatile organic compounds, at an applied voltage of 1.5 V. The composite films also exhibited significant sensing response of ∼6.11 × 102 towards temperature and light with recovery and response time of ∼3.5 min and 2.16 min, respectively. Finally, the fabricated sensor showed good repeatability and sensitivity upon cyclic exposure to gas, light, and temperature. The ZnO/PANI nanocomposite film demonstrated overall sensing behavior in terms of sensor recovery time and response as well as repeatability
SponsorThis publication was made possible by the support of an NPRP grant from the Qatar National Research Fund (NPRP 7- 673- 2- 251). The statements made herein are solely the responsibility of the authors.
Languageen
PublisherElsevier Ltd
SubjectElectrical properties
mSILAR
Photo and gas sensor
Polyaniline
Selectivity
Zinc oxide (ZnO)
TitleHighly selective gas sensors from photo-activated ZnO/PANI thin films synthesized by mSILAR
TypeArticle
Pagination123-130
Volume Number232
dc.accessType Abstract Only


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