Nanostructured ferric oxides (A and B) were synthesized via chemical precipitation method using two different precipitating agents i.e. ammonium hydroxide and sodium hydroxide. X-ray diffraction proved the formation of ferric oxide. Crystallite sizes of the materials A and B were 40 and 18 nm respectively. Surface morphology of sample B reveals that it has more adsorption sites in comparison to A. Further the pellets and thick films of materials A and Bwere prepared and investigated with the exposition of humidity from 10%RH to 90 %RH. It was found that the thick film prepared with material B was most sensitive among all having maximum average sensitivity 8.12 MΩ/%RH. Good sensitivity, less hysteresis, and reproducibility identify that fabricated humidity sensor (B) is promising for the device application.
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