Spin Coated Reduced Graphene Oxide (rGO) Thin Films for NO₂ Detection

Author(s)	Jayesh Suresh Jadhav, Narendra Uttamrao Patil, Dnyaneshwar Daulatrao Lokhand
Country	India
Abstract	Spin-coated reduced graphene oxide (rGO) thin films were fabricated on glass substrates and investigated for their gas sensing performance toward various reducing and oxidizing gases. Graphene oxide films were deposited using the spin-coating technique. The gas sensing characteristics of the rGO films were systematically studied for H₂S, NO₂, CO₂, NH₃ and CH₄ gases over a wide operating temperature range of 30–150 °C. The experimental results revealed that the rGO thin films exhibited a pronounced and selective response toward NO₂ compared to other tested gases. The maximum gas response (63.48%) was observed at an optimal operating temperature of 120 °C for an NO₂ concentration of 700 ppm. The rGO thin films demonstrated good selectivity, reproducibility and rapid response and recovery characteristics, indicating efficient adsorption and desorption processes. The observed sensing performance highlights the suitability of spin-coated rGO thin films for reliable and selective NO₂ detection. The obtained results suggest that rGO-based thin film sensors prepared by a simple and cost-effective spin-coating technique hold strong potential for practical gas sensing applications.
Keywords	Reduced graphene oxide; Spin coating; Thin film gas sensor; NO₂ sensing; Selectivity.
Published In	Volume 16, Issue 4, October-December 2025
Published On	2025-12-11

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