EFFECT OF ANNEALING ON GAS SENSING PERFORMANCE OF NANOSTRUCTURED ZnO THICK FILM RESISTORS

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International Journal on Smart Sensing and Intelligent Systems

Professor Subhas Chandra Mukhopadhyay

Exeley Inc. (New York)

Subject: Computational Science & Engineering, Engineering, Electrical & Electronic

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VOLUME 5 , ISSUE 1 (March 2012) > List of articles

EFFECT OF ANNEALING ON GAS SENSING PERFORMANCE OF NANOSTRUCTURED ZnO THICK FILM RESISTORS

Sarika D. Shinde / G. E. Patil / D. D. Kajale / V. G. Wagh / V. B. Gaikwad / G. H. Jain *

Keywords : ZnO nano-particles, annealing, TEM, thick films, gas sensor.

Citation Information : International Journal on Smart Sensing and Intelligent Systems. Volume 5, Issue 1, Pages 277-294, DOI: https://doi.org/10.21307/ijssis-2017-481

License : (CC BY-NC-ND 4.0)

Received Date : 01-February-2012 / Accepted: 27-February-2012 / Published Online: 01-March-2012

ARTICLE

ABSTRACT

ZnO nano-particles have been synthesized by simple chemical route using a starting solution consisting of zinc acetate and citric acid as a surfactant agent. The structural properties of the prepared ZnO nano-particles annealed at different temperatures have been characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses. The XRD patterns show ZnO-wurtize phase in the nano-powders, and size of crystals increases by increasing the annealing temperatures. The TEM images show nano-particles as clusters with size in the range of 10-20 nm. Electron diffraction pattern of nano-powders annealed at 900oC temperature shows a well distribution of spherical particles due to the effect of citric acid as surfactant in chemical process. Thick films prepared by screen printing technique from zinc oxide nano-powders annealed at different temperatures (500–900 oC), characterized by SEM analysis and tested for various gases. The film prepared from ZnO powder annealed at 700oC shows the higher sensitivity to H2S gas for 10 ppm gas concentration.

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