Title

Conductivity And Sensing Properties Of In2O3 + Zno Mixed Nanostructured Films: Effect Of Composition And Temperature

Keywords

Conductivity; Mixed metal-oxide; Nanocomposite film; Semiconductor; Sensor response

Abstract

The conductivity and conductometric sensor response of mixed In 2O3 +ZnO nanocrystalline composite systems to H 2 and CO in air ambience are investigated for varying oxide compositions. The maximum sensor response to H2 and CO is obtained for composite films containing 15wt% and 80wt% In2O3. This sensor response is also much higher than the values obtained for the individual oxides. The sensory mechanism is proposed to be largely determined by the dependence of the conduction paths on the film composition. The major factors determining the conductivity and sensor response of the In2O 3 +ZnO composite are: (i) the modification of the electronic structure of the crystals (mainly, In2O3) during the synthesis of the composite, (ii) the electron transfer from In2O 3 to ZnO, and (iii) the catalytic activity of ZnO in the dissociation reactions of O2 and H2. © 2013 Elsevier B.V. All rights reserved.

Publication Date

1-1-2013

Publication Title

Sensors and Actuators, B: Chemical

Volume

187

Number of Pages

514-521

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.snb.2013.03.017

Socpus ID

84885472070 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84885472070

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