Silver-doped zinc oxide single nanowire multifunctional nanosensor with a significant enhancement in response.

Lupan, O., Cretu, V., Postica, V., Ahmadi, M., Cuenya, B. R., Chow, L., Tiginyanu, I., Viana, B., Pauporte, T. and Adelung, Rainer (2016) Silver-doped zinc oxide single nanowire multifunctional nanosensor with a significant enhancement in response. Sensors and Actuators B-Chemical, 223 . pp. 893-903. DOI http://dx.doi.org/10.1016/j.snb.2015.10.002.

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Abstract

Enhanced performances were obtained for nanosensors based on a single nanowire of silver-doped zinc oxide (ZnO:Ag). Arrays of crystalline ZnO:Ag nanowires were synthesized by electrodeposition on Fdoped tin oxide coated substrates and studied by SEM, EDX, TEM, HRTEM, SIMS, XPS, PL and microRaman spectroscopy. Integration of a single nanowire or a single microwire on the chip was performed by employing metal maskless nanodeposition in the dual beam focused electron/ion beam instrument. The ultraviolet (UV) response and hydrogen (H-2) gas response were studied for nanodevices and microdevices based on a single ZnO:Ag nanowire. We found that ZnO:Ag nanowire based nanosensor possesses a much faster response/recovery time and a higher response to UV radiation and hydrogen gas (similar to 50%) than those reported in literature. An increase in current value of about two orders in magnitude I-UVON/I-UVOFF was observed under exposure to UV light. Faster response/recovery times of about 0.98 s/0.87 s were observed. The ZnO:Ag nanowires and microwires can serve as nano-building materials for ultrasensitive and ultra-fast sensors with reduced power consumption. The mechanisms for such improved responses to UV and H-2 were discussed. The developed nanomaterial is of great scientific interest for further studies as promising candidates for fabricating multifunctional nano-sensors, LEDs and photodetectors by bottomup and hybrid nanotechnologies. (C) 2015 Elsevier B.V. All rights reserved.

Document Type: Article
Additional Information: Times Cited: 18 Lupan, Oleg Cretu, Vasilii Postica, Vasile Ahmadi, Mahdi Cuenya, Beatriz Roldan Chow, Lee Tiginyanu, Ion Viana, Bruno Pauporte, Thierry Adelung, Rainer
Keywords: Nanocrystalline materials, ZnO:Ag, Nanowire, Nanosensor, Nano-photodetector
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
Open Access Journal?: No
DOI etc.: http://dx.doi.org/10.1016/j.snb.2015.10.002
ISSN: 0925-4005
Projects: Future Ocean
Date Deposited: 16 Mar 2017 08:44
Last Modified: 27 May 2019 15:08
URI: http://oceanrep.geomar.de/id/eprint/36199

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