Nickel oxide thin film sensor for fluctuation-enhanced gas sensing of formaldehyde
2015 (English)In: 2015 IEEE SENSORS, 2015Conference paper (Refereed)
Nanocrystalline nickel-oxide-based thin films were prepared by advanced reactive gas deposition, and the response of these films to formaldehyde was studied by fluctuation-enhanced sensing. Morphological and structural analyses showed porous deposits of nickel oxide particles with face-centered cubic structure. Resistance fluctuations were measured upon exposure to ethanol, formaldehyde and methane at 200 degrees C. Power density spectra were used to quantify the response. The response to formaldehyde was higher than to ethanol at 200 degrees C, and no significant response was observed for methane thus demonstrating some gas-species selectivity.
Place, publisher, year, edition, pages
nickel oxide; formaldehyde; gas sensor; fluctuation-enhanced sensing; gas evaporation
IdentifiersURN: urn:nbn:se:uu:diva-268295ISI: 000380440800240ISBN: 9781479982035OAI: oai:DiVA.org:uu-268295DiVA: diva2:876389
IEEE Sensors Conference, Busan, Korea, November 1-4