Nanoceria based thin films as efficient humidity sensors

Herein, we project the efficiency of cerium oxide nanostructures in humidity sensing. Truncated octahedral particles, rods, cubes and octahedral particles have been synthesized by adopting different synthesis routes to this effect. The obtained systems are well characterized by Fourier Transform Infrared spectroscopy (FTIR), X-Ray Diffraction (XRD) analysis, Electron microscopic analysis (SEM &TEM), Brunauer Emmet Teller (BET) surface area analysis, Raman spectroscopy and photoluminescence spectroscopy. The exponential decrease in the resistance of thin films of ceria nanostructures upon increase in relative humidity in the surroundings is investigated. The promising response of ceria nano systems towards humidity suggests their utility in environmental applications.