Co 3O 4/ZnO nanocomposites: From plasma synthesis to gas sensing applications

D. Bekermann; A. Gasparotto; D. Barreca; C. Maccato; E. Comini; C. Sada; G. Sberveglieri; A. Devi; R. A. Fischer

doi:10.1021/am201591w

Co ₃O ₄/ZnO nanocomposites: From plasma synthesis to gas sensing applications

D. Bekermann, A. Gasparotto, D. Barreca, C. Maccato, E. Comini, C. Sada, G. Sberveglieri, A. Devi, R. A. Fischer

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

149 Scopus citations

Abstract

Herein, we describe the design, fabrication and gas sensing tests of p-Co ₃O ₄/n-ZnO nanocomposites. Specifically, arrays of 〈001〉 oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co ₃O ₄ nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co ₃O ₄ particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH ₃COCH ₃, CH ₃CH ₂OH, NO ₂) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.

Original language	English
Pages (from-to)	928-934
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	4
Issue number	2
DOIs	https://doi.org/10.1021/am201591w
State	Published - 22 Feb 2012
Externally published	Yes

Keywords

Co O /ZnO
gas sensors
nanocomposites
plasma enhanced-chemical vapor deposition

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10.1021/am201591w

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title = "Co 3O 4/ZnO nanocomposites: From plasma synthesis to gas sensing applications",

abstract = "Herein, we describe the design, fabrication and gas sensing tests of p-Co 3O 4/n-ZnO nanocomposites. Specifically, arrays of 〈001〉 oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co 3O 4 nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co 3O 4 particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH 3COCH 3, CH 3CH 2OH, NO 2) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.",

keywords = "Co O /ZnO, gas sensors, nanocomposites, plasma enhanced-chemical vapor deposition",

author = "D. Bekermann and A. Gasparotto and D. Barreca and C. Maccato and E. Comini and C. Sada and G. Sberveglieri and A. Devi and Fischer, {R. A.}",

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doi = "10.1021/am201591w",

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T2 - From plasma synthesis to gas sensing applications

AU - Bekermann, D.

AU - Gasparotto, A.

AU - Barreca, D.

AU - Maccato, C.

AU - Comini, E.

AU - Sada, C.

AU - Sberveglieri, G.

AU - Devi, A.

AU - Fischer, R. A.

PY - 2012/2/22

Y1 - 2012/2/22

N2 - Herein, we describe the design, fabrication and gas sensing tests of p-Co 3O 4/n-ZnO nanocomposites. Specifically, arrays of 〈001〉 oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co 3O 4 nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co 3O 4 particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH 3COCH 3, CH 3CH 2OH, NO 2) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.

AB - Herein, we describe the design, fabrication and gas sensing tests of p-Co 3O 4/n-ZnO nanocomposites. Specifically, arrays of 〈001〉 oriented ZnO nanoparticles were grown on alumina substrates by plasma enhanced-chemical vapor deposition (PECVD) and used as templates for the subsequent PECVD of Co 3O 4 nanograins. Structural, morphological and compositional analyses evidenced the successful formation of pure and high-area nanocomposites with a tailored overdispersion of Co 3O 4 particles on ZnO and an intimate contact between the two oxides. Preliminary functional tests for the detection of flammable/toxic analytes (CH 3COCH 3, CH 3CH 2OH, NO 2) indicated promising sensing responses and the possibility of discriminating between reducing and oxidizing species as a function of the operating temperature.

KW - Co O /ZnO

KW - gas sensors

KW - nanocomposites

KW - plasma enhanced-chemical vapor deposition

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JO - ACS Applied Materials and Interfaces

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ER -

Co ₃O ₄/ZnO nanocomposites: From plasma synthesis to gas sensing applications

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Keywords

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