Investigation of Pt and Pd Modified WO{sub 3} and ZnO Based Thin Film Sensors for Ethanol Sensing

Journal Article · Fri Jun 15 04:00:00 EDT 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-017-3105-9· OSTI ID:22860485

Roy, Subhashis; Dey, Anup; Biswas, Bikram

Ethanol sensors based on different WO{sub 3} and ZnO structures are studied in the present work. The XRD and SEM processes are used to characterize the sensing layer’s surface morphology which reveals the presence of nanoparticle in sensing layer. Further reducing the nanoparticle diameter by the addition of palladium (Pd) and platinum (Pt) for both the sensors (ZnO and WO{sub 3}) gives good results on sensitivity, operating temperature, response time and recovery time. Nanoparticle diameter for undoped WO{sub 3}, Pd-modified WO{sub 3} and Pt-modified WO{sub 3} based sensors is 11.8, 6 and 5.4 nm, whereas nanoparticle diameter for undoped, Pd-modified and Pt-modified ZnO based sensors is 20, 14 and 11 nm, respectively. Analysis of dynamic response of the sensors when exposed to different concentrations of ethanol vapour (from 500 to 10,000 ppm) and various temperatures indicate the improvement in sensitivity up to 77.2% for WO{sub 3} and 74.6% for ZnO based sensors.

• OSTI ID: 22860485
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 6 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ECOLOGICAL CONCENTRATION
ETHANOL
LAYERS
NANOMATERIALS
NANOPARTICLES
PALLADIUM ADDITIONS
PLATINUM ADDITIONS
SCANNING ELECTRON MICROSCOPY
SEMICONDUCTOR MATERIALS
SENSITIVITY
SENSORS
SURFACES
THIN FILMS
TUNGSTEN OXIDES
X-RAY DIFFRACTION
ZINC OXIDES