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Impedimetric humidity sensor based on the use of SnO2–Co3O4 spheres

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Abstract

The article describes synthesis and sensing properties of SnO2–Co3O4 spheres composed of aggregated nanoparticles. Co3O4 was doped with pristine SnO2, and the resulting nanocomposite spheres were incorporated into a silicon adhesive. This material is shown to enable impedimetric sensing of relative humidity (RH). The impedance of the material decreases by 80% at a 1.0 kHz working frequency and by a factor of 2500 at 100 Hz. Capacitance increases by 70% at 1.0 kHz frequency and by a factor of 1509 at 100 Hz. The sensor works in the 10–90% RH range at temperatures from 10 to 80 °C. SnO2–Co3O4 based humidity sensor exhibited high sensitivity which makes it suitable material for the utilization in humidity meter.

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Acknowledgements

The authors are grateful to the Department of Chemistry and the Center of Excellence for Advanced Materials Research (CEAMR) at King Abdulaziz University for providing research facilities.

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Authors and Affiliations

  1. Center of Excellence for Advanced Materials Research, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia

    Muhammad Tariq Saeed Chani, Abdullah M. Asiri & Sher Bahadar Khan

  2. Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia

    Muhammad Tariq Saeed Chani, Abdullah M. Asiri & Sher Bahadar Khan

  3. Department of Chemistry, Kohat University of Science & Technology, Kohat, Khyber Pakhtunkhwa, 26000, Pakistan

    Alaud Din, M. I. Khan & Murad Ali Khan

  4. GIK Institute of Engineering Sciences and Technology, Topi, Swabi, 23640, Pakistan

    Kh. S. Karimov

  5. Center for Innovative Development of Science and New Technologies of Academy of Sciences of Tajikistan, Dushanbe, 734025, Tajikistan

    Kh. S. Karimov

  6. Division of Nano Sciences and Department of Chemistry, Ewha Womans University, Seoul, Korea

    Kalsoom Akhtar

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  1. Alaud Din
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  2. Kh. S. Karimov
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  3. Kalsoom Akhtar
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  4. M. I. Khan
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  5. Muhammad Tariq Saeed Chani
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  6. Murad Ali Khan
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  7. Abdullah M. Asiri
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  8. Sher Bahadar Khan
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Correspondence to Sher Bahadar Khan.

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Din, A., Karimov, K.S., Akhtar, K. et al. Impedimetric humidity sensor based on the use of SnO2–Co3O4 spheres. J Mater Sci: Mater Electron 28, 4260–4266 (2017). https://doi.org/10.1007/s10854-016-6049-1

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  • DOI: https://doi.org/10.1007/s10854-016-6049-1

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