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Open AccessArticle

Single-Nanowire Fuse for Ionization Gas Detection

1
Key Laboratory of Advanced Display and System Applications of Ministry of Education, Shanghai University, 149 Yanchang Road, Shanghai 200072, China
2
National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Shanghai Jiao Tong University, Shanghai 200240, China
3
Key Laboratory of Thin Film and Microfabrication of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200240, China
4
School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(20), 4358; https://doi.org/10.3390/s19204358
Received: 10 September 2019 / Revised: 27 September 2019 / Accepted: 30 September 2019 / Published: 9 October 2019
(This article belongs to the Special Issue Nano and MEMS Sensors)
Local electric field enhancement is crucial to detect gases for an ionization gas sensor. Nanowires grown collectively along the identical lattice orientation have been claimed to show a strong tip effect in many previous studies. Herein, we propose a novel ionization gas detector structure by using a single crystalline silicon nanowire as one electrode that is placed above the prepatterned nanotips. A significant improvement of the local electric field in its radical direction was obtained leading to an ultralow operation voltage for gas breakdown. Different from the tip of the nanowire in the reported ionization gas sensors, the gaseous discharge current in this device flows towards the sidewall in the case of a trace amount of gas environment change. Technically, this discharge current brings about a sudden temperature rise followed by a fusion of the silicon nanowire. Such unique fusibility of a single nanowire in this gas detection device suggests a novel architecture that is portable and in-site executable and can be used as an integrated gas environmental monitor. View Full-Text
Keywords: Nano-electromechanical systems; nanosensor; single nanowire device; gas detectors Nano-electromechanical systems; nanosensor; single nanowire device; gas detectors
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MDPI and ACS Style

Liu, H.; Zhu, W.; Han, Y.; Yang, Z.; Huang, Y. Single-Nanowire Fuse for Ionization Gas Detection. Sensors 2019, 19, 4358.

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