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We have fabricated, reduced graphene oxide (rGO) coated poly methyl methacrylate (PMMA) based thermoplastic polyurethane (TPU) nanocomposites for NO 2  gas sensing. The rGO-coated PMMA beads and MWCNTs were incorporated into the TPU matrix in different concentrations by melt mixing. The characterization was done to confirm the preparation of the nanocomposites. The rGO-coated PMMA-TPU nanocomposites exhibit excellent electrical conductivities and efficient NO 2  gas sensing. The developed sensor can sense NO 2  at room temperature with the highest response time of 19 s and an average response time of 23.67 s. The sensor is recovered within 31.4 s and has a limit of detection of 9.51 ppm.

Reduced graphene oxide coated poly-methyl methacrylate beads based thermoplastic polyurethane nanocomposites for gas sensing applications