Enhanced Gas Sensing Properties of Different ZnO 3D Hierarchical Structures

Ambra Fioravanti; Antonino Bonanno; Mauro Mazzocchi; Maria Cristina Carotta; Michele Sacerdoti

doi:10.4028/www.scientific.net/AST.99.48

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Sensitivity and Selectivity of SnO₂-Based Sensor for CO and H₂ Detections: A Novel Method to Detect Simultaneously the CO and H₂ Concentrations
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HomeAdvances in Science and TechnologyAdvances in Science and Technology Vol. 99Enhanced Gas Sensing Properties of Different ZnO...

Enhanced Gas Sensing Properties of Different ZnO 3D Hierarchical Structures

Abstract:

Six different ZnO nanomorphologies were synthesized trough wet chemical routes starting from a water solution of zinc nitrate hexahydrate, obtaining two types of morphologies: bidimensional nanocrystals and nanoparticles aggregates. Powders and films characterizations have been carried out by means of TG–DTA, SEM, and X-ray diffraction analysis. Finally, electrical measurements were performed with the aim to compare conductive properties of the thick films, surface barrier heights and gas sensing features, mainly versus acetone and other VOCs related to the breath gas analysis. Among the different morphologies tested, it turned out that the samples constituted by nanoparticle aggregates exhibited the best performances versus all gases, but especially toward acetone at sub-ppm level.

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Periodical:

Advances in Science and Technology (Volume 99)

Pages:

48-53

DOI:

https://doi.org/10.4028/www.scientific.net/AST.99.48

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Online since:

October 2016

Authors:

Ambra Fioravanti, Antonino Bonanno, Mauro Mazzocchi, Maria Cristina Carotta*, Michele Sacerdoti

Keywords:

Nanomorphology, Semiconductors Oxides, Thick Film Gas Sensors, Zinc Oxide

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