Hybrid materials based on wide band gap semiconductors and dye molecules are intensively studied for photovoltaic applications. However, these materials also possess interesting gas sensitivities, besides these photonic effects. In this Article, we report the study, under visible light illumination, of the porphyrin-functionalized ZnO nanorod photoconductivity changes, modulated by exposure to two volatile organic compounds, ethanol and triethylamine, chosen as model analytes. The sensitivity to triethylamine exceeds that to ethanol by more than two orders of magnitude, showing a selectivity that is not found in other porphyrin-based gas sensors. This feature could open the way to a novel generation sensors, where photoactivation plays a role in determining both sensitivity and selectivity of the resulting device.

Sivalingam, Y., Martinelli, E., Catini, A., Magna, G., Pomarico, G., Basoli, F., et al. (2012). Gas-Sensitive Photoconductivity of Porphyrin-Functionalized ZnO Nanorods. JOURNAL OF PHYSICAL CHEMISTRY. C, 116(16), 9151-9157 [10.1021/jp302225u].

Gas-Sensitive Photoconductivity of Porphyrin-Functionalized ZnO Nanorods

MARTINELLI, EUGENIO;Catini, A;Magna, G;PAOLESSE, ROBERTO;DI NATALE, CORRADO
2012-01-01

Abstract

Hybrid materials based on wide band gap semiconductors and dye molecules are intensively studied for photovoltaic applications. However, these materials also possess interesting gas sensitivities, besides these photonic effects. In this Article, we report the study, under visible light illumination, of the porphyrin-functionalized ZnO nanorod photoconductivity changes, modulated by exposure to two volatile organic compounds, ethanol and triethylamine, chosen as model analytes. The sensitivity to triethylamine exceeds that to ethanol by more than two orders of magnitude, showing a selectivity that is not found in other porphyrin-based gas sensors. This feature could open the way to a novel generation sensors, where photoactivation plays a role in determining both sensitivity and selectivity of the resulting device.
2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/07 - FONDAMENTI CHIMICI DELLE TECNOLOGIE
Settore ING-INF/01 - ELETTRONICA
English
Con Impact Factor ISI
Sivalingam, Y., Martinelli, E., Catini, A., Magna, G., Pomarico, G., Basoli, F., et al. (2012). Gas-Sensitive Photoconductivity of Porphyrin-Functionalized ZnO Nanorods. JOURNAL OF PHYSICAL CHEMISTRY. C, 116(16), 9151-9157 [10.1021/jp302225u].
Sivalingam, Y; Martinelli, E; Catini, A; Magna, G; Pomarico, G; Basoli, F; 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/2108/63869
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