Series and parallel connection of individual Pd-modified ZnO nanowires for gas sensing applications
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LUPAN, Oleg, POSTICA, Vasile, CREŢU, Vasilii, PAUPORTE, Thierry, ADELUNG, Rainer. Series and parallel connection of individual Pd-modified ZnO nanowires for gas sensing applications. In: Moldavian Journal of the Physical Sciences, 2016, nr. 3-4(15), pp. 139-149. ISSN 1810-648X.
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Moldavian Journal of the Physical Sciences
Numărul 3-4(15) / 2016 / ISSN 1810-648X /ISSNe 2537-6365

Series and parallel connection of individual Pd-modified ZnO nanowires for gas sensing applications
CZU: 536.21:621.9+539.51

Pag. 139-149

Lupan Oleg123, Postica Vasile1, Creţu Vasilii1, Pauporte Thierry3, Adelung Rainer2
 
1 Technical University of Moldova,
2 Institute for Material Science, Christian-Albrechts-University of Kiel,
3 PSL Research University, Chimie ParisTech - CNRS, Institut de Recherche de Chimie Paris
 
Disponibil în IBN: 26 ianuarie 2017


Rezumat

The hydrogen gas sensing properties of nanodevices based on two ZnO nanowires (NWs) functionalized/modified with palladium (Pd/ZnO) at room temperature are studied. The main goal of the study is to find which of the connections—in series or in parallel—is more favorable to improve the properties of a double NW nanodevice in comparison with a single Pd/ZnO NWbased nanosensor. An enhancement in gas response is observed in both cases. In the case of connection in series of two NWs, it is attributed to an increased number of Schottky barriers, which are directly related to sensor response to gases. In the case of parallel connection of two NWs, higher electrical currents can flow through the device; it improves the sensor response too; in addition, this type of device can be more easily integrated in electronics due to higher currents in passive regime (in air) and is more stable.