Porphyrins coated ZnO is an interesting material where the exposure to light and gas may cooperate to modulate the respective sensitivities. In this work, the gas sensing properties of porphyrins functionalized laterally grown ZnO nanorods are introduced. The porphyrin layer incompletely coats the semiconductor surface in order to keep both ZnO and porphyrins in contact with analyte. It is known that UV light may prompt the chemical sensitivity of ZnO replacing the high temperature condition. Here we demonstrate that because of the photo-injection of electrons from porphyrin to the ZnO, the same impact could be acquired with visible light.
The gas sensing properties of porphyrins-coated laterally grown ZnO nanorods / Sivalingam, Yuvaraj; Martinelli, Eugenio; Businaro, L.; Gerardino, A.; Maiolo, L.; Catini, Alexandro; Pomarico, Giuseppe; Basoli, Francesco; Paolesse, Roberto; Di Natale, Corrado. - In: PROCEDIA ENGINEERING. - ISSN 1877-7058. - 87:(2014), pp. 1039-1042. (Intervento presentato al convegno EUROSENSORS 2014Conference on Nanotechnology tenutosi a Brescia, Italy) [10.1016/j.proeng.2014.11.339].
The gas sensing properties of porphyrins-coated laterally grown ZnO nanorods
Pomarico, Giuseppe;
2014
Abstract
Porphyrins coated ZnO is an interesting material where the exposure to light and gas may cooperate to modulate the respective sensitivities. In this work, the gas sensing properties of porphyrins functionalized laterally grown ZnO nanorods are introduced. The porphyrin layer incompletely coats the semiconductor surface in order to keep both ZnO and porphyrins in contact with analyte. It is known that UV light may prompt the chemical sensitivity of ZnO replacing the high temperature condition. Here we demonstrate that because of the photo-injection of electrons from porphyrin to the ZnO, the same impact could be acquired with visible light.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
