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Resistive room temperature LPG sensor based on a graphene/CdO nanocomposite

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Abstract

The authors decribe an ultra-sensitive, room temperature, flexible transparent LPG sensor based on the use of a CdO/graphene nanocomposite. The graphene prevents the accumulation of CdO, enhances the surface area, and acts as a gas sensing material. FESEM images show a uniform decoration of CdO nanoparticles on graphene. The CdO/graphene composite was deposited as a film on interdigitated electrodes (IDEs) which then were used for chemiresistive sensing of liquid petroleum gas (LPG) by using a four probe technique. A Resistivity decreases significantly upon exposure to a LPG. The electrical resistance measurement at a constant bias voltage of 0.5 V. The sensor of type CdO/graphene (1 wt.%) exhibits a sensitivity of 600 ppm of LPG at 27 °C. It is a highly selective, stable and sensitive to low concentration of LPG even at room temperature.

The gas sensing properties of CdO/graphene nanocomposite with different weight percentages were studied using chemiresistive technique.

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Acknowledgments

The author (KVR) is thankful to Science and Engineering Research Board (SERB) - Department of Science and Technology (DST), Government of India, [Project No. SB/EMEQ-183/2013] for the generous financial support.

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Authors and Affiliations

  1. Nano Electronics Laboratory, Centre for Nano Science and Technology, JNT University Hyderabad, Kukatpally, Telangana, 500085, India

    Solleti Goutham, Naradala Jayarambabu & Kalagadda Venkateswara Rao

  2. Department of Mechanical Engineering, Institute of Aeronautical Engineering, Dundigal, Hyderabad, Telangana, 500043, India

    Chinta Sandeep

  3. Department of Mechanical and Industrial Engineering, Qatar University, P.O. Box 2713, Doha, Qatar

    Kishor Kumar Sadasivuni

  4. Department of Chemical Engineering, IIT-Hyderabad, Kandi, Hyderabad, Telangana, 502285, India

    Devarai Santhosh Kumar

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  1. Solleti Goutham
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  2. Naradala Jayarambabu
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  3. Chinta Sandeep
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  4. Kishor Kumar Sadasivuni
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  6. Kalagadda Venkateswara Rao
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Correspondence to Kalagadda Venkateswara Rao.

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Goutham, S., Jayarambabu, N., Sandeep, C. et al. Resistive room temperature LPG sensor based on a graphene/CdO nanocomposite. Microchim Acta 186, 62 (2019). https://doi.org/10.1007/s00604-018-3170-2

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