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Journal of Nanoparticle Research

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01.04.2013 | Research Paper

Gas sensor based on photoconductive electrospun titania nanofibres operating at room temperature

verfasst von: E. Zampetti, A. Macagnano, A. Bearzotti

Erschienen in: Journal of Nanoparticle Research | Ausgabe 4/2013

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Abstract

An important drawback of semiconductor gas sensors is their operating temperature that needs the use of heaters. To overcome this problem a prototyping sensor using titania nanofibres (with an average diameter of 50 nm) as sensitive membrane were fabricated by electrospinning directly on the transducer of the sensor. Exploiting the effect of titania photoconductivity, resistance variations upon gas interaction under continuous irradiation of ultra violet light were measured at room temperature. The resistive sensor response was evaluated towards ammonia, nitrogen dioxide and humidity. The sensor exhibited a higher response to ammonia than to nitrogen dioxide, especially for concentrations larger than 100 ppb. For 200 ppb of ammonia and nitrogen dioxide, the responses were ~2.8 and 1.5 %, respectively.

Vorheriger Artikel Control growth of single crystalline ZnO nanorod arrays and nanoflowers with enhanced photocatalytic activity

Nächster Artikel Semiconductor nanocrystals dispersed in imidazolium-based ionic liquids: a spectroscopic and morphological investigation

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Titel: Gas sensor based on photoconductive electrospun titania nanofibres operating at room temperature
verfasst von: E. Zampetti
A. Macagnano
A. Bearzotti
Publikationsdatum: 01.04.2013
Verlag: Springer Netherlands
Erschienen in: Journal of Nanoparticle Research / Ausgabe 4/2013
Print ISSN: 1388-0764
Elektronische ISSN: 1572-896X
DOI: https://doi.org/10.1007/s11051-013-1566-9

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