Fabrication of chemiresistive gas sensors based on multistep reduced graphene oxide for low parts per million monitoring of sulfur dioxide at room temperature

•Multi step reduction process of graphene oxide is proposed.•Low energy nitrogen ion beam implantation leads to enhancement in electrical conductivity and specific surface area.•Room temperature operated SO2 gas sensors have been fabricated using MSRGO samples.•MSRGO is found to be promising for SO2...

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