Nanoceria based thin films as efficient humidity sensors

•Ceria nanosystems of four different morphologies synthesized.•Truncated octahedral particles exhibits excellent humidity sensing ability with response time; 10s and sensitivity; 99%.•The humidity sensing efficiency depends on surface area and the amount of Ce4+ present in the system. Herein, we pro...

Full description

Saved in:
Bibliographic Details
Published in:Sensors and actuators. A. Physical. 2017-07, Vol.261, p.85-93
Main Authors: Divya, T., Nikhila, M.P., Anju, M., Arsha Kusumam, T.V., Akhila, A.K., Ravikiran, Y.T., Renuka, N.K.
Format: Article
Language:English
Subjects:
Ceria nanostructures
Cerium oxides
Cubes
Fourier transforms
Humidity
Humidity sensing
Infrared analysis
Nanostructured materials
Particle physics
Photoluminescence
Recovery time
Relative humidity
Response time
Sensors
Spectroscopic analysis
Thin films
X-ray diffraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•Ceria nanosystems of four different morphologies synthesized.•Truncated octahedral particles exhibits excellent humidity sensing ability with response time; 10s and sensitivity; 99%.•The humidity sensing efficiency depends on surface area and the amount of Ce4+ present in the system. 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.
ISSN:0924-4247
1873-3069
DOI:10.1016/j.sna.2017.05.008