Enhanced UV and ethanol vapour sensing of a single 3-D ZnO tetrapod alloyed with Fe 2 O 3 nanoparticles.

Lupan, O., Postica, V., Gröttrup, J., Mishra, A. K., de Leeuw, N. H. and Adelung, Rainer (2017) Enhanced UV and ethanol vapour sensing of a single 3-D ZnO tetrapod alloyed with Fe 2 O 3 nanoparticles. Sensors and Actuators B: Chemical, 245 . pp. 448-461. DOI 10.1016/j.snb.2017.01.107.

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Abstract

Fabrication of multifunctional devices based on nano- and microstructures of a single semiconducting oxide is an important step for a better understanding of their maximum sensing properties and the base for the development of bottom-up nanotechnologies. In this work we have fabricated, for the first time devices based on a single or two interconnected ZnO tetrapods (T), doped with Fe and alloyed with Fe2O3 nanoparticles (NPs) and microparticles (MPs) in order to improve their sensing properties towards ultraviolet (UV) sensing and ethanol vapour (EtOH). Compared to pristine ZnO-T improved UV and gas sensing properties of Fe-doped ZnO-T were observed. By Fe2O3-alloying of Fe-doped ZnO-T further improvement in sensing properties was obtained with a reduced influence of the relative humidity (RH) on the sensing response. A gas sensing mechanism was proposed and discussed in detail based on the alloyed Fe2O3 NPs and MPs. The results presented here demonstrate the efficiency of doping and alloying of single ZnO microstructures with other semiconducting oxides to improve their sensing properties, including the decrease in influence of RH on the gas response and the rapidity of the sensors.

Document Type: Article
Keywords: Single tetrapod, Zinc oxide, Hetero, Ethanol, Nanosensor, Hybrid
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/j.snb.2017.01.107
ISSN: 0925-4005
Projects: Future Ocean
Date Deposited: 14 Dec 2017 12:28
Last Modified: 06 May 2019 11:08
URI: http://oceanrep.geomar.de/id/eprint/40631

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