Effective design and fabrication of low-power-consumption self-heated SnO2 nanowire sensors for reducing gases

SENSORS AND ACTUATORS B-CHEMICAL

卷:295

Article

Trinh Minh Ngoc¹  Nguyen Van Duy¹  Nguyen Duc Hoa¹  Chu Manh Hung¹  Hugo Nguyen²  Nguyen Van Hieu^3,4,5 

[1] Hanoi Univ Sci & Technol, Int Training Inst Mat Sci, 1 Dai Co Viet Str, Hanoi 100000, Vietnam

[2] Uppsala Univ, Dept Engn Sci, Lagerhyddsvagen 1, S-75121 Uppsala, Sweden

[3] Phenikaa Univ, Fac Elect & Elect Engn, Hanoi 10000, Vietnam

[4] Phenikaa Univ, Phenikaa Inst Adv Study, Hanoi 10000, Vietnam

[5] Phenikaa Res & Technol Inst PRATI, A&A Green Phoenix Grp, 167 Hoang Ngan, Hanoi 10000, Vietnam

关键词: SnO2 nanowires;    Nanojunction;    Self-heated sensor;    Low-power consumption;   

DOI  :  10.1016/j.snb.2019.05.074

来源: Elsevier

【 摘 要 】

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 H2S, NH3 and C2H5OH, by using the developed self-heated NWs.

【 授权许可】

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