Fig. 2From: Graphene impregnated electrospun nanofiber sensing materials: a comprehensive overview on bridging laboratory set-up to industryReproduced with permission from [181] Copyright 2019 Elsevier(1): Pristine and GO-SnO2 NTs preparation and gas sensor mechanism and (2) SEM images of (a) as-prepared Sn + poly (vinyl pyrrolidone) (PVP) nanofibers (b, c) pristine SnO2, and (d, e) GO incorporate SnO2 NTs, (f) Histogram of GO-SnO2 NT diametersBack to article page