Ag/ZnO nanomaterials as high performance sensors for flammable and toxic gases

Quentin Simon; Davide Barreca; Alberto Gasparotto; Chiara MacCato; Eugenio Tondello; Cinzia Sada; Elisabetta Comini; Anjana Devi; Roland A. Fischer

doi:10.1088/0957-4484/23/2/025502

Ag/ZnO nanomaterials as high performance sensors for flammable and toxic gases

Quentin Simon, Davide Barreca, Alberto Gasparotto, Chiara MacCato, Eugenio Tondello, Cinzia Sada, Elisabetta Comini, Anjana Devi, Roland A. Fischer

Research output: Contribution to journal › Article › peer-review

57 Scopus citations

Abstract

Ag/ZnO nanocomposites supported on polycrystalline Al ₂O ₃ were synthesized by an unprecedented approach combining plasma enhanced chemical vapor deposition (PE-CVD) of ZnO matrices and the subsequent deposition of Ag nanoparticles (NPs) by radio frequency (RF) sputtering. The system structure, composition and morphology were investigated by glancing incidence x-ray diffraction (GIXRD), secondary ion mass spectrometry (SIMS), field emission scanning electron microscopy (FE-SEM) and energy dispersive x-ray spectroscopy (EDXS). A tailored dispersion and distribution of silver particles could be obtained under mild conditions by the sole variation of the sputtering time. Gas sensing properties toward flammable and toxic gases, both reducing (CH ₃CH ₂OH, CH ₃COCH ₃) and oxidizing (O ₃), were investigated in the temperature range 100400°C. Beside the high sensitivity, the developed sensors exhibited a response proportional to Ag content, thanks to catalytic and electronic effects promoted by silver NPs. In addition, discrimination between oxidizing and reducing analytes was enabled by a suitable choice of the adopted working temperature.

Original language	English
Article number	025502
Journal	Nanotechnology
Volume	23
Issue number	2
DOIs	https://doi.org/10.1088/0957-4484/23/2/025502
State	Published - 20 Jan 2012
Externally published	Yes

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title = "Ag/ZnO nanomaterials as high performance sensors for flammable and toxic gases",

abstract = "Ag/ZnO nanocomposites supported on polycrystalline Al 2O 3 were synthesized by an unprecedented approach combining plasma enhanced chemical vapor deposition (PE-CVD) of ZnO matrices and the subsequent deposition of Ag nanoparticles (NPs) by radio frequency (RF) sputtering. The system structure, composition and morphology were investigated by glancing incidence x-ray diffraction (GIXRD), secondary ion mass spectrometry (SIMS), field emission scanning electron microscopy (FE-SEM) and energy dispersive x-ray spectroscopy (EDXS). A tailored dispersion and distribution of silver particles could be obtained under mild conditions by the sole variation of the sputtering time. Gas sensing properties toward flammable and toxic gases, both reducing (CH 3CH 2OH, CH 3COCH 3) and oxidizing (O 3), were investigated in the temperature range 100400°C. Beside the high sensitivity, the developed sensors exhibited a response proportional to Ag content, thanks to catalytic and electronic effects promoted by silver NPs. In addition, discrimination between oxidizing and reducing analytes was enabled by a suitable choice of the adopted working temperature.",

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AU - Simon, Quentin

AU - Barreca, Davide

AU - Gasparotto, Alberto

AU - MacCato, Chiara

AU - Tondello, Eugenio

AU - Sada, Cinzia

AU - Comini, Elisabetta

AU - Devi, Anjana

AU - Fischer, Roland A.

PY - 2012/1/20

Y1 - 2012/1/20

N2 - Ag/ZnO nanocomposites supported on polycrystalline Al 2O 3 were synthesized by an unprecedented approach combining plasma enhanced chemical vapor deposition (PE-CVD) of ZnO matrices and the subsequent deposition of Ag nanoparticles (NPs) by radio frequency (RF) sputtering. The system structure, composition and morphology were investigated by glancing incidence x-ray diffraction (GIXRD), secondary ion mass spectrometry (SIMS), field emission scanning electron microscopy (FE-SEM) and energy dispersive x-ray spectroscopy (EDXS). A tailored dispersion and distribution of silver particles could be obtained under mild conditions by the sole variation of the sputtering time. Gas sensing properties toward flammable and toxic gases, both reducing (CH 3CH 2OH, CH 3COCH 3) and oxidizing (O 3), were investigated in the temperature range 100400°C. Beside the high sensitivity, the developed sensors exhibited a response proportional to Ag content, thanks to catalytic and electronic effects promoted by silver NPs. In addition, discrimination between oxidizing and reducing analytes was enabled by a suitable choice of the adopted working temperature.

AB - Ag/ZnO nanocomposites supported on polycrystalline Al 2O 3 were synthesized by an unprecedented approach combining plasma enhanced chemical vapor deposition (PE-CVD) of ZnO matrices and the subsequent deposition of Ag nanoparticles (NPs) by radio frequency (RF) sputtering. The system structure, composition and morphology were investigated by glancing incidence x-ray diffraction (GIXRD), secondary ion mass spectrometry (SIMS), field emission scanning electron microscopy (FE-SEM) and energy dispersive x-ray spectroscopy (EDXS). A tailored dispersion and distribution of silver particles could be obtained under mild conditions by the sole variation of the sputtering time. Gas sensing properties toward flammable and toxic gases, both reducing (CH 3CH 2OH, CH 3COCH 3) and oxidizing (O 3), were investigated in the temperature range 100400°C. Beside the high sensitivity, the developed sensors exhibited a response proportional to Ag content, thanks to catalytic and electronic effects promoted by silver NPs. In addition, discrimination between oxidizing and reducing analytes was enabled by a suitable choice of the adopted working temperature.

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Ag/ZnO nanomaterials as high performance sensors for flammable and toxic gases

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