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Sensors 2014, 14(4), 6806-6818; doi:10.3390/s140406806

Ozone Sensing Based on Palladium Decorated Carbon Nanotubes

1,* , 2
1 Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas 152, 07730 D.F., Mexico 2 Aix-Marseille Université, CNRS, UMR 7334, Av. E.N. Niémen 13397, Marseille, France 3 Departamento de Física y Matemáticas, Universidad Iberoamericana, Prolongación Paseo de Reforma 880, Lomas de Santa Fe, 011219 D.F., Mexico 4 Instituto Politécnico Nacional, Centro de Investigación en Computación, Av. Juan de Dios Batiz s/n Col. Nueva Industrial Vallejo 07738 D.F., Mexico
* Author to whom correspondence should be addressed.
Received: 20 February 2014 / Revised: 4 April 2014 / Accepted: 8 April 2014 / Published: 14 April 2014
(This article belongs to the Section Chemical Sensors)
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Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on a film of sensitive material (MWCNTs-Pd) deposited by drop coating on platinum interdigitated electrodes on a SiO2 substrate. The sensor exhibited a resistance change to ozone (O3) with a response time of 60 s at different temperatures and the capability of detecting concentrations up to 20 ppb. The sensor shows the best response when exposed to O3 at 120 °C. The device shows a very reproducible sensor performance, with high repeatability, full recovery and efficient response.
Keywords: gas sensor; ozone; multiwall carbon nanotubes; Pd nanoparticles gas sensor; ozone; multiwall carbon nanotubes; Pd nanoparticles
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Colindres, S.C.; Aguir, K.; Cervantes Sodi, F.; Vargas, L.V.; Salazar, J.A.M.; Febles, V.G. Ozone Sensing Based on Palladium Decorated Carbon Nanotubes. Sensors 2014, 14, 6806-6818.

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