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Porous sol gel silica films doped with crystalline NiO nanoparticles for gas sensing applications

  • Nanomaterials and Thin Films
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Abstract

A reliable sol gel route to synthesize NiO doped SiO2 films with different NiO content is here described. The films showed detectable and reversible changes in both optical and electrical properties when exposed to some reducing/oxidizing gaseous species at temperatures in the 250°C–350°C range. A functional characterization protocol has been designed and some of the sensing properties of the materials have been investigated for detecting NO2, CH4, CO and H2. An optical transmittance increase up to 2% has been detected for 1% CO in dry air atmospheres, while relative resistance response (R R = R gas/R air) values up to 4.97 for 850 ppm H2/air mixtures have been registered for conductometric gas sensing. Films at all NiO molar concentrations in the 10% NiO - 40% range showed an optical response to the target gas, while only 30% and 40% NiO films provided a detectable gas induced resistance change.

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Authors and Affiliations

  1. Dipartimento di Ingegneria Meccanica – Settore Materiali, via Marzolo 9, I35131, Padova, Italy

    D. Buso, M. Guglielmi & A. Martucci

  2. Dipartimento di Chimica e Materiali, Università dell’Aquila, I67040, Monteluco di Roio, L’Aquila, Italy

    C. Cantalini

  3. Institute for Chemical Process and Environmental Technology, National Research Council of Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada

    M. L. Post

  4. Département de physique et d’astronomie, Université de Moncton, Moncton, N.-B, E1A 3E9, Canada

    A. Haché

Authors
  1. D. Buso
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  2. M. Guglielmi
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  3. A. Martucci
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  4. C. Cantalini
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  5. M. L. Post
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  6. A. Haché
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Correspondence to A. Martucci.

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Buso, D., Guglielmi, M., Martucci, A. et al. Porous sol gel silica films doped with crystalline NiO nanoparticles for gas sensing applications. J Sol-Gel Sci Technol 40, 299–308 (2006). https://doi.org/10.1007/s10971-006-8958-6

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  • DOI: https://doi.org/10.1007/s10971-006-8958-6

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