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High sensitivity of isopropyl alcohol gas sensor based on memristor device operated at room temperature

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Abstract

In this paper, we present the high sensitivity of an isopropyl alcohol gas sensor, which is based on a memristor device that is operated at room temperature. We proposed the SnO2-based memristor to detect isopropyl alcohol and demonstrated the change in the current of the SnO2-based memristor that is monitored in real time depending on concentration of the isopropyl alcohol gas at room temperature. As a result, the current of the SnO2-based memristor is drastically decreased as we introduced isopropyl alcohol into the memristor based gas sensor. A change in current, which depends on the concentration of the isopropyl alcohol gas, was evaluated as the sensitivity and the sensitivity was 2.02 for 30 ppm isopropyl alcohol gas. In addition, in the proposed SnO2-based memristor, we observed an immediate response of < 4 s when exposed to isopropyl alcohol as well as an immediate recovery of < 6 s when flowing of the injected gas was stopped.

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Acknowledgements

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (no. NRF-2020R1F1A1048423) and by Korea Institute for Advancement of Technology (KIAT) grant funded by the Korea Government (MOTIE) (P0012451, The Competency Development Program for Industry Specialist).

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Authors and Affiliations

  1. Department of Electrical Engineering and Convergence Engineering for Intelligent Drone, Sejong University, 209, Neungdong-ro, Gwangjin-gu, Seoul, 05006, Korea

    Doowon Lee, Dongjoo Bae, Myoungsu Chae & Hee-Dong Kim

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  1. Doowon Lee
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  2. Dongjoo Bae
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  3. Myoungsu Chae
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  4. Hee-Dong Kim
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Correspondence to Hee-Dong Kim.

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Lee, D., Bae, D., Chae, M. et al. High sensitivity of isopropyl alcohol gas sensor based on memristor device operated at room temperature. J. Korean Phys. Soc. 80, 1065–1070 (2022). https://doi.org/10.1007/s40042-022-00470-6

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  • DOI: https://doi.org/10.1007/s40042-022-00470-6

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