Chemoresistors working at room temperature are attractive for low-consumption integrated sensors. Previous studies show that this feature can be obtained with photoconductive porphyrins-coated ZnO nanostructures. Furthermore, variations of the porphyrin molecular structure alter both the chemical sensitivity and the photoconductivity, and can be used to define the sensor characteristics. Based on these assumptions, we investigated the properties of an array of four sensors made of a layer of ZnO nanoparticles coated with porphyrins with the same molecular framework but different metal atoms. The array was tested with five volatile organic compounds (VOCs), each measured at different concentrations. Results confirm that the features of individual porphyrins influence the sensor behavior, and the differences among sensors are enough to enable the discrimination of volatile compounds disregarding their concentration. © 2017 by the authors; Licensee MDPI, Basel, Switzerland.

Magna, G., Catini, A., Kumar, R., Palmacci, M., Martinelli, E., Paolesse, R., et al. (2017). Conductive photo-activated porphyrin-ZnO nanostructured gas sensor array. SENSORS, 17(4) [10.3390/s17040747].

Conductive photo-activated porphyrin-ZnO nanostructured gas sensor array

Magna G.;Catini A.;Palmacci M.;Martinelli E.;Paolesse R.;di Natale C.
2017

Abstract

Chemoresistors working at room temperature are attractive for low-consumption integrated sensors. Previous studies show that this feature can be obtained with photoconductive porphyrins-coated ZnO nanostructures. Furthermore, variations of the porphyrin molecular structure alter both the chemical sensitivity and the photoconductivity, and can be used to define the sensor characteristics. Based on these assumptions, we investigated the properties of an array of four sensors made of a layer of ZnO nanoparticles coated with porphyrins with the same molecular framework but different metal atoms. The array was tested with five volatile organic compounds (VOCs), each measured at different concentrations. Results confirm that the features of individual porphyrins influence the sensor behavior, and the differences among sensors are enough to enable the discrimination of volatile compounds disregarding their concentration. © 2017 by the authors; Licensee MDPI, Basel, Switzerland.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07 - Fondamenti Chimici delle Tecnologie
Settore ING-INF/01 - Elettronica
English
Con Impact Factor ISI
Chemical sensors; Gas detectors; Metal nanoparticles; Molecular structure; Nanoparticles; Nanostructures; Photoconductivity; Sensitivity analysis; Volatile organic compounds; Zinc oxide, Chemical sensitivity; Integrated sensors; Molecular frameworks; Photo-activated; Sensor characteristics; Volatile compounds; ZnO nanoparticles; ZnO nanostructures, Porphyrins; Gas sensor arrays; Nanoparticles; Porphyrins; ZnO
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85017005840&doi=10.3390%2fs17040747&partnerID=40&md5=adb3006d14288192db22d44adf6cd21f
Magna, G., Catini, A., Kumar, R., Palmacci, M., Martinelli, E., Paolesse, R., et al. (2017). Conductive photo-activated porphyrin-ZnO nanostructured gas sensor array. SENSORS, 17(4) [10.3390/s17040747].
Magna, G; Catini, A; Kumar, R; Palmacci, M; Martinelli, E; Paolesse, R; di Natale, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/193381
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