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Study of Characteristics of the Sensor Detecting of Low Concentration of Ammonia

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Journal of Contemporary Physics (Armenian Academy of Sciences) Aims and scope

Abstract

In this work, the morphology of Fe2O3:ZnO (60 : 40 mol %) film and gas sensing characteristics to ammonia vapors at different operating temperatures were investigated. The SEM investigation of the surface of the sensitive film of Fe2O3:ZnO showed that the grain size in the film was about 50 nm. The sensor showed sensitivity to ammonia vapors starting at 200°C and the operating temperature was chosen as 250°C. The low detection limit of the sensor based on Fe2O3:ZnO is quite low (~14 ppm) and at this concentration of ammonia vapors the resistance of the sensor changed more than 1.5 times. The enhanced parameters of the Fe2O3:ZnO-based sensor will allow using this structure in ammonia detecting devices.

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Funding

The work was carried out within the framework of the Faculty Research Funding Program (2020), funded by the Enterprise Incubator Foundation with Philip Morris Armenia LLC. The work was supported by the Science Committee of RA, in the frames of the research project № 21T-2J062.

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Authors and Affiliations

  1. Yerevan State University, Yerevan, Armenia

    M. S. Aleksanyan, A. G. Sayunts, G. H. Shahkhatuni, V. M. Aroutiounian & G. E. Shahnazaryan

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  1. M. S. Aleksanyan
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  2. A. G. Sayunts
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  3. G. H. Shahkhatuni
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  4. V. M. Aroutiounian
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  5. G. E. Shahnazaryan
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Correspondence to M. S. Aleksanyan.

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Translated by V.M. Aroutiounian

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Aleksanyan, M.S., Sayunts, A.G., Shahkhatuni, G.H. et al. Study of Characteristics of the Sensor Detecting of Low Concentration of Ammonia. J. Contemp. Phys. 56, 352–358 (2021). https://doi.org/10.3103/S1068337221040034

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  • DOI: https://doi.org/10.3103/S1068337221040034

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