Effective design and fabrication of low-power-consumption self-heated SnO 2 nanowire sensors for reducing gases

Developing metal oxide gas sensors for internet-of-things (IoT) and portable applications require low-power consumption because of the limited battery in devices. This requirement is challenging because metal oxide sensors generally need high working temperatures, especially for reducing gases. Here...

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Bibliographic Details
Published inSensors and actuators. B, Chemical Vol. 295; p. 144
Main Authors Trinh, Minh Ngoc, Duy, Nguyen Van, Nguyen Duc, Hoa, Chu, Manh Hung, Nguyen, Hugo, Hieu, Nguyen Van
Format Journal Article
LanguageEnglish
Published 2019
Subjects
SnO2 nanowires
Self-heated sensor
Low-power consumption
Nanojunction
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Summary:Developing metal oxide gas sensors for internet-of-things (IoT) and portable applications require low-power consumption because of the limited battery in devices. This requirement is challenging because metal oxide sensors generally need high working temperatures, especially for reducing gases. Herein, we present an effective design and fabrication method of a SnO2 nanowire (NW) sensor for reducing gases by using the Joule heating effect at NW nanojunctions without needing an external or integrated heater. The sensor’s low-power consumption at around 4 mW was controlled by the size and nanojunction density of the device. The sensor has a simple design and is easy to fabricate. A proof-of-concept of a portable gas sensor module can be realised for monitoring highly toxic reducing gases, such as H 2S, NH3 and C2H5OH, by using the developed self-heated NWs.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2019.05.074