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

Goutham, Solleti and Jayarambabu, N and Devarai, Santhosh Kumar and et al, . (2019) Resistive room temperature LPG sensor based on a graphene/CdO nanocomposite. Microchimica Acta, 186 (2). ISSN 0026-3672

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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.

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