Fabrication of Ag embedded−SnS films via the RF approach: First study on NO2 gas–sensing performance

•The radio frequency (RF) sputtering approach is used to synthesize 5-nm thick-Ag on SnS film.•Silver ultra-thin film was distributed on the surface SnS film, enhancing hole mobility, surface plasmon resonance, as well as covering nano–cracks on the surface of the SnS film.•Ag/SnS film–based gas–sen...

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