Size-dependent UV and gas sensing response of individual Fe2O3-ZnO:Fe micro- and nanowire based devices
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GROTTRUP, Jorit; POSTICA, Vasilie; ABABII, Nicolai; LUPAN, Oleg; ZAMPONI, Christiane; MEYNERS, Dirk; MISHRA, Yogendra Kumar; ŞONTEA, Victor; TIGINYANU, Ion; ADELUNG, Rainer. Size-dependent UV and gas sensing response of individual Fe2O3-ZnO:Fe micro- and nanowire based devices. In: Journal of Alloys and Compounds. 2017, nr. 701, pp. 920-925. ISSN 0925-8388.
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Journal of Alloys and Compounds
Numărul 701 / 2017 / ISSN 0925-8388

Size-dependent UV and gas sensing response of individual Fe2O3-ZnO:Fe micro- and nanowire based devices


DOI: 10.1016/j.jallcom.2016.12.346
Pag. 920-925

Grottrup Jorit1, Postica Vasilie2, Ababii Nicolai2, Lupan Oleg12, Zamponi Christiane1, Meyners Dirk1, Mishra Yogendra Kumar1, Şontea Victor2, Tiginyanu Ion2, Adelung Rainer1
 
1 Institute for Material Science, Christian-Albrechts- University of Kiel,
2 Technical University of Moldova
 
Disponibil în IBN: 16 decembrie 2017


Rezumat

In this work, the UV and gas sensing properties of single Fe-doped and Fe2O3-functionalized ZnO micro- and nanowires are reported. The influence of microwire diameter and concentration of Fe2O3micro- and nanoparticles on the sensing properties of the fabricated devices was investigated. Results clearly reveal that sensors with a higher response can be obtained by a decrease in the diameter of micro- and nanowires and an increase of the Fe2O3micro- and nanoparticle concentration on the surface of microwires. The enhanced sensing properties can be explained based on excellent charge separation properties of the formed Fe2O3/ZnO heterojunctions in the case of UV response which prolong the photocarrier lifetime and based on excellent catalytic properties of Fe2O3in the case of gas sensing. The presented results demonstrate the importance of surface functionalization of single ZnO structures with other semiconducting oxide micro- and nanoparticles for the improvement of their sensing properties, i.e., UV and ethanol sensing, even for a single wire/rod with micro- and nanometric diameter.

Cuvinte-cheie
Doped, Ethanol sensor, Fe2O3, Functionalized, ZnO microwire,

Nanowire,

UV