Ammonia Gas Detection by Tannic Acid Functionalized and Reduced Graphene Oxide at Room Temperature

Figure 4

(a) Respond towards variation of NH₃ concentration. (b) Respond when exposed to cycles of NH₃. (c) The linear respond with increase of NH₃ concentration. (d) Selectivity respond when exposed to ethanol, acetone, and ammonia.

(a)

(b)

(c)

(d)