Reducing gas response kinetics of nanostructured indium oxide thin films

Nanostructured indium oxide thin films were prepared by spin-coating the precursor solution on highly porous substrates. Porous substrates were prepared by modifying the surface of glass substrate using poly(methylmethacrylate) solution. Scanning electron microscopic images of the films coated on mo...

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Bibliographic Details
Published in:Thin solid films 2010-10, Vol.518 (24), p.e125-e128
Main Authors: Seetha, M., Bharathi, S., Mangalaraj, D., Nataraj, D.
Format: Article
Language:English
Subjects:
In 2O 3
PMMA
Room temperature gas sensor
Surface modified substrates
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Summary:Nanostructured indium oxide thin films were prepared by spin-coating the precursor solution on highly porous substrates. Porous substrates were prepared by modifying the surface of glass substrate using poly(methylmethacrylate) solution. Scanning electron microscopic images of the films coated on modified glass substrates show algae-like growth which occupies a larger surface area when compared to the films coated on unmodified substrates which is in accordance with the atomic force microscopic images. Gas sensing property of the films coated on modified substrates showed notable sensitivity even at room temperature. The sensor response for ammonia and ethanol is around 1.8 and 1.5 respectively.
ISSN:0040-6090
1879-2731
DOI:10.1016/j.tsf.2010.03.105