Figure 3From: Preparation of NiO two-dimensional grainy films and their high-performance gas sensors for ammonia detection XRD and EDS analysis of NiO film. (A) XRD pattern of NiO film. (B) EDS analysis confirming that the as-prepared films are composed of only Ni and O elements. (C) EDS analysis at two different detection points of NiO film.Back to article page