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Printed Flexible Sensors Functionalized with TiO2 Nanowires for Room Temperature CO2 Gas Sensing

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TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

The monitoring of CO2 concentration is important for the environment and health. The present work reports a printed silver electrodes CO2 sensor with TiO2 nanowires coated on the surface. The silver electrode sensor was printed with a Voltera PCB printer. TiO2 nanowires were attached to the electrodes by an electro-deposition method. Variations in resistance of the sensing element by the exposure of CO2 gas were successfully observed at room temperature without additional heat. The printed CO2 sensor shows responses from 78 ppm to more than 1055 ppm with a response time of 92 s and a recovery time of 25 s. The selectivity experiment displays that the printed sensor does not respond to methane, CO, NH3, H2, or H2S at 1000 ppm or higher concentration, but it is slightly sensitive to humidity. The response is 2% for 1000 ppm CO2 , while the response is 0.7% when the relative humidity changes from 48 to 99%. The present results display a facile method to develop highly sensitive and selective CO2 sensors operating at room temperature.

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Acknowledgements

This research work is supported by the funding from NASA-MSFC-UTK CAN Project (80MSFC19M003).

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Authors and Affiliations

  1. Department of Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, TN, 37996, USA

    Lingyue Zhang, Yongchao Yu, Zachary James & Anming Hu

  2. Jiangnan University, 1800 Lihu Ave, Binhu Qu, Wuxi Shi, Jiangsu Sheng, China

    Yaxuan Liu

  3. Marshall Space Flight Center, National Aeronautics and Space Administration, Huntsville, AL, 35812, USA

    Curtis Hill

Authors
  1. Lingyue Zhang
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  2. Yongchao Yu
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  3. Zachary James
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  4. Yaxuan Liu
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  5. Curtis Hill
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  6. Anming Hu
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Correspondence to Anming Hu .

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    © 2020 The Minerals, Metals & Materials Society

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    Zhang, L., Yu, Y., James, Z., Liu, Y., Hill, C., Hu, A. (2020). Printed Flexible Sensors Functionalized with TiO2 Nanowires for Room Temperature CO2 Gas Sensing. In: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36296-6_181

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