Room temperature NO2 gas sensing of Au-loaded tungsten oxide nanowires/porous silicon hybrid structure
SEM images of (a) plan view and (b) cross section view of the porous silicon, (c) unloaded WO3 nanowires/porous silicon, (d) low magnification, (e) high magnification, and (f) corresponding cross-sectional SEM image of Au-loaded WO3 nanowires.
