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Review

Metal–Oxide Nanowire Molecular Sensors and Their Promises

1
Department of Applied Chemistry, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
2
JST-PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
3
Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasuga-Koen, Kasuga, Fukuoka 816-8580, Japan
*
Authors to whom correspondence should be addressed.
Academic Editor: Simas Rackauskas
Chemosensors 2021, 9(2), 41; https://doi.org/10.3390/chemosensors9020041
Received: 15 January 2021 / Revised: 15 February 2021 / Accepted: 19 February 2021 / Published: 22 February 2021
(This article belongs to the Special Issue Nanowire-Based Sensors)
During the past two decades, one–dimensional (1D) metal–oxide nanowire (NW)-based molecular sensors have been witnessed as promising candidates to electrically detect volatile organic compounds (VOCs) due to their high surface to volume ratio, single crystallinity, and well-defined crystal orientations. Furthermore, these unique physical/chemical features allow the integrated sensor electronics to work with a long-term stability, ultra-low power consumption, and miniature device size, which promote the fast development of “trillion sensor electronics” for Internet of things (IoT) applications. This review gives a comprehensive overview of the recent studies and achievements in 1D metal–oxide nanowire synthesis, sensor device fabrication, sensing material functionalization, and sensing mechanisms. In addition, some critical issues that impede the practical application of the 1D metal–oxide nanowire-based sensor electronics, including selectivity, long-term stability, and low power consumption, will be highlighted. Finally, we give a prospective account of the remaining issues toward the laboratory-to-market transformation of the 1D nanostructure-based sensor electronics. View Full-Text
Keywords: nanowire; oxide; gas sensor; device; 1D nanostructure; sensing mechanism nanowire; oxide; gas sensor; device; 1D nanostructure; sensing mechanism
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MDPI and ACS Style

Zeng, H.; Zhang, G.; Nagashima, K.; Takahashi, T.; Hosomi, T.; Yanagida, T. Metal–Oxide Nanowire Molecular Sensors and Their Promises. Chemosensors 2021, 9, 41. https://doi.org/10.3390/chemosensors9020041

AMA Style

Zeng H, Zhang G, Nagashima K, Takahashi T, Hosomi T, Yanagida T. Metal–Oxide Nanowire Molecular Sensors and Their Promises. Chemosensors. 2021; 9(2):41. https://doi.org/10.3390/chemosensors9020041

Chicago/Turabian Style

Zeng, Hao, Guozhu Zhang, Kazuki Nagashima, Tsunaki Takahashi, Takuro Hosomi, and Takeshi Yanagida. 2021. "Metal–Oxide Nanowire Molecular Sensors and Their Promises" Chemosensors 9, no. 2: 41. https://doi.org/10.3390/chemosensors9020041

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