Proceedings of the First International Conference on Combinatorial and Optimization, ICCAP 2021, December 7-8 2021, Chennai, India

Research Article

Facile flexible sensors based on CNT-metal oxide nanocomposites for CO2 sensing

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  • @INPROCEEDINGS{10.4108/eai.7-12-2021.2314737,
        author={Ashok Kumar  L and Alagappan  M and Ria  George and Janani  K M},
        title={Facile flexible sensors based on CNT-metal oxide nanocomposites for CO2 sensing},
        proceedings={Proceedings of the First International Conference on Combinatorial and Optimization, ICCAP 2021, December 7-8 2021, Chennai, India},
        publisher={EAI},
        proceedings_a={ICCAP},
        year={2021},
        month={12},
        keywords={cnt/metal oxide nanocomposites gas sensing chemiresistor nano sensor composites},
        doi={10.4108/eai.7-12-2021.2314737}
    }
    
  • Ashok Kumar L
    Alagappan M
    Ria George
    Janani K M
    Year: 2021
    Facile flexible sensors based on CNT-metal oxide nanocomposites for CO2 sensing
    ICCAP
    EAI
    DOI: 10.4108/eai.7-12-2021.2314737
Ashok Kumar L1,*, Alagappan M1, Ria George1, Janani K M1
  • 1: PSG College of Technology
*Contact email: lak.eee@psgtech.ac.in

Abstract

Portable and wearable gas sensors are required to judge and warn people about the condition of the air they walk into and thus deter accidents caused by gas leakage, saving life and machinery.Synthesis and characterization of CNT / metal oxide nanocomposites with two different compositions, namely SnO2 and ZnO are investigated in this paper. The nanocomposites are coated using a simple drop casting method over a flexible electrode with interdigitated geometry. The fabricated sensors are tested for CO2 gas in a custom-made test set up. It was observed that SnO2 and ZnO are n-type semiconductors in which resistance increased with increasing CO2 concentration. The facile hydrothermal synthesis process, ease of fabrication, and room temperature operability make metal oxide Nano composites with CNT as a good candidate for CO2 gas sensing.