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Preparation of Nanostructured ZnO Thin Films Using Magnetron Sputtering for the Gas Sensors Applications

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Abstract

ZnO is one of the most promising transparent conducting oxide materials, which widely used in thin film gas sensors. In this research, the dependence of the thermal oxidation time on structural, morphological and gas sensing properties of ZnO thin films is investigated. ZnO nanostructures are synthesized by using DC magnetron sputtering for deposition of pure zinc layers on glass substrates and then thermal oxidation of deposited zinc layers to produce zinc oxide (ZnO) thin films. Obtained results from X-ray diffraction revealed that the degree of crystallinity and the average grain size of the ZnO deposited thin films enhance with increasing the thermal oxidation time. Surface topography and growth behavior of ZnO thin films have important role in optimization of gas sensing properties of these films. In this study, scanning electron microscopy and atomic force microscopy have been used to investigate the effective parameters related to the surface topography of the films. Obtained results from these analyzes revealed that the surface topography of ZnO deposited samples strongly depend on thermal oxidation time. Also the effect of thermal oxidation time on the performance of ZnO gas sensors is investigated. The results indicated that the ethanol gas sensing properties of ZnO samples improve with decreasing the size of grains.

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Authors and Affiliations

  1. Young Researchers and Elite Club, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Mohammad Taghi Hosseinnejad & Marzieh Shirazi

  2. Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Mahmood Ghoranneviss, Mohammad Reza Hantehzadeh & Elham Darabi

Authors
  1. Mohammad Taghi Hosseinnejad
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  2. Marzieh Shirazi
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  3. Mahmood Ghoranneviss
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  4. Mohammad Reza Hantehzadeh
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  5. Elham Darabi
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Correspondence to Mohammad Taghi Hosseinnejad.

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Hosseinnejad, M.T., Shirazi, M., Ghoranneviss, M. et al. Preparation of Nanostructured ZnO Thin Films Using Magnetron Sputtering for the Gas Sensors Applications. J Inorg Organomet Polym 26, 405–412 (2016). https://doi.org/10.1007/s10904-015-0324-0

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  • DOI: https://doi.org/10.1007/s10904-015-0324-0

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