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Research Article | Open Access

Sensitivity of Cadmium Sulfide under the Influence of Both Substrate Temperature and Gas Operation

Ehssan Salah Hassan1, Zaid Saud Razzaq2, Huda Ashur Shati Qutbi3, Sami Salman Chiad4, Nadir Fadhil Habubi4, Khalid Haneen Abass5( )
Department of Physics, College of Science, Mustansiriyah University, Baghdad, Iraq
Department of Sciences, Faculty of Basic Education, Al-Muthanna University, Al Muthanna, Iraq
Physiology and Medical Physics Department, College of Medicine, University of Wasit, Wasit, Iraq
Department of Physics, College of Education, Mustansiriyah University, Baghdad, Iraq
Department of Physics, College of Education for Pure Sciences, University of Babylon, Iraq
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Abstract

The importance of this research is to study the effect of changing the temperature at the same time on each of the prepared samples and during the gas sensing processes, the effects of substrate temperature Ts were investigated after precipitation by the microstructural and optical characteristics of cadmium sulfide using thermal spraying method with different temperatures of (300, 400, and 500) ℃. The structural investigations of these films were studied, showing that the increases in substrate temperature were shown cubic and hexagonal phases according to ICDD card no. (21-0929) and (43-0989). The dramatic change occurred at 500 ℃ in changing the phase from hexagonal to a cubic structure. XRD exhibits a dominant plane at (200) for different substrate temperatures. Optical transmittance, absorption coefficient, and energy gap values were calculated by UV/VIS spectrophotometer. These results showed that the band gap values decreased with increasing substrate temperature. The gas sensitivity was tested for NO2 gas at several working temperatures from 175 ℃ to 250 ℃, and various gas concentrations from 150 ppm to 200 ppm and found that the sensitivity increase with increasing both the operating temperature and gas concentration for a Ts at 500 ℃ which offer also the best crystallization the best sensitivity at an operating temperature of 175 ℃ is 75% at a gas concentration of 150 ppm.

Keywords

SPMSubstrate temperatureHexagonal phaseCubic phaseSensitivityRecovery and response time

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Nano Biomedicine and Engineering
Volume 13 Issue 4,
December 2021
Pages 425-432
DOI: 10.5101/nbe.v13i4.p425-432
Cite this article:
Salah Hassan E, Saud Razzaq Z, Ashur Shati Qutbi H, et al. Sensitivity of Cadmium Sulfide under the Influence of Both Substrate Temperature and Gas Operation. Nano Biomedicine and Engineering, 2021, 13(4): 425-432. https://doi.org/10.5101/nbe.v13i4.p425-432

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Received: 04 May 2021
Accepted: 02 December 2021
Published: 16 December 2021
© Ehssan Salah Hassan, Zaid Saud Razzaq, Huda Ashur Shati Qutbi, Sami Salman Chiad, Nadir Fadhil Habubi, and Khalid Haneen Abass.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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