Change search
ReferencesLink to record
Permanent link

Direct link
Gas sensors based on anodic tungsten oxide
Show others and affiliations
2011 (English)In: Sensors and actuators. B, Chemical, ISSN 0925-4005, Vol. 153, no 2, 293-300 p.Article in journal (Refereed) Published
Abstract [en]

Nanostructured porous tungsten oxide materials were synthesized by the means of electrochemical etching (anodization) of tungsten foils in aqueous NaF electrolyte. Formation of the sub-micrometer size mesoporous particles has been achieved by infiltrating the pores with water. The obtained colloidal anodic tungsten oxide dispersions have been used to fabricate resistive WO3 gas sensors by drop casting the sub-micrometer size mesoporous particles between Pt electrodes on Si/SiO2 substrate followed by calcination at 400 °C in air for 2 h. The synthesized WO3 films show slightly nonlinear current–voltage characteristics with strong thermally activated carrier transport behavior measured at temperatures between −20 °C and 280 °C. Gas response measurements carried out in CO, H2, NO and O2 analytes (concentration from 1 to 640 ppm) in air as well as in Ar buffers (O2 only in Ar) exhibited a rapid change of sensor conductance for each gas and showed pronounced response towards H2 and NO in Ar and air, respectively. The response of the sensors was dependent on temperature and yielded highest values between 170 °C and 220 °C.

Place, publisher, year, edition, pages
Elsevier B V , 2011. Vol. 153, no 2, 293-300 p.
Keyword [en]
Metal oxide, Tungsten oxide, Gas sensing, Sensor, Anodic oxidation, Drop casting
URN: urn:nbn:se:umu:diva-41410DOI: 10.1016/j.snb.2010.10.043OAI: diva2:405956
Available from: 2011-03-24 Created: 2011-03-24 Last updated: 2011-03-24Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Shchukarev, AndreyMikkola, Jyri-Pekka
By organisation
Department of Chemistry
In the same journal
Sensors and actuators. B, Chemical

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 122 hits
ReferencesLink to record
Permanent link

Direct link