SYNTHESIS OF HIGHLY STABLE SILVER-LOADED VERTICAL ZnO NANOWIRES ARRAY AND ITS ACETYLENE SENSING PROPERTIES

Abu Sadat Mohammad Iftekhar Uddin and Gwiy-Sang Chung
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Abu Sadat Mohammad Iftekhar Uddin: School of Electrical Engineering, University of Ulsan, 93 Deahak-ro, Nam-gu, Ulsan 680-749, Republic of Korea
Gwiy-Sang Chung: School of Electrical Engineering, University of Ulsan, 93 Deahak-ro, Nam-gu, Ulsan 680-749, Republic of Korea

Surface Review and Letters (SRL), 2016, vol. 23, issue 01, 1-9

Abstract: A silver-loaded one-dimensional (1D) vertical ZnO nanowires (NWs) array synthesized by a facile seed mediated hydrothermal-RF magnetron sputtering method has been investigated for the fabrication of a highly stable and reproducible acetylene (C2H2) gas sensor. Successful immobilization of silver nanoparticles (NPs) as a sensitizer on the ZnO NWs array significantly enhanced the C2H2 sensing properties and showed a stable sensing performance. The grown structure exhibited high response magnitude (30.8 at 1000ppm), short response time (43s) and excellent selectivity at 220∘C. The enhanced performance can probably be accounted for the effect of combining the highly orientated ZnO NWs and catalytically active silver-based network. The superior sensing features toward C2H2 along with broad detection range (1–1000ppm), outstanding stability and excellent reproducibility indicate that the sensor is a promising candidate for practical applications.

Keywords: ZnO nanowires; silver catalyst; gas sensor; acetylene; stability (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X15500870

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