High-sensitivity low-power tungsten doped niobium oxide nanorods sensor for nitrogen dioxide air pollution monitoring

doi:10.1016/j.snb.2016.07.001

	High-sensitivity low-power tungsten doped niobium oxide nanorods sensor for nitrogen dioxide air pollution monitoring
	Yu, J.1; Cheung, K.W.1; Yan, W.H.1; Li, Y.X.2; Ho, D.1
刊名	Sensors and Actuators, B: Chemical
	2017
卷号	238 页码:204-213
ISSN号	09254005
DOI	10.1016/j.snb.2016.07.001
英文摘要	The accurate sensing of air pollutants such as nitrous oxide gas (NOx) has wide medical and industrial applications. For conventional polycrystalline film based sensors, achieving adequate sensitivity, especially at room temperature, still remains a challenge. In this paper, we present an investigation on the hydrothermal synthesis, device fabrication, and electronic properties, and NO2gas sensing performance of tungsten doped niobium oxide nanorods. The gas sensing capability of metal oxide nanorods can be significantly improved through doping, as the increase in electron density at the material surface results in a significant impedance change upon the presence of adsorbates. Results indicate that exposure to 9.9 ppm of NO2gas at 25 °C causes sensor outputs of 0.33 V and 3.4 V for 1 μA and 10 μA biases, respectively. For a 100 μA bias, the response at 410 °C and 450 °C demonstrated outputs of 16.1 V and 12.2 V, respectively. Compared to the recent literature, the nanorod sensor demonstrated a several orders-of-magnitude improvement in voltage response toward ppb-level NO2gas under both room temperature (25 °C) and elevated temperature (450 °C), while keeping power consumption at the microwatt level. Such low powered operation enables the ubiquitous deployment of compact, portable and maintenance-free environmental sensors. © 2016 Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25923]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Department of Physics and Materials Science, City University of Kong, Tat Chee Avenue, Kowloon, Hong Kong; 2.The Key Laboratory of Inorganic Functional Materials and Devices, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
推荐引用方式 GB/T 7714	Yu, J.,Cheung, K.W.,Yan, W.H.,et al. High-sensitivity low-power tungsten doped niobium oxide nanorods sensor for nitrogen dioxide air pollution monitoring[J]. Sensors and Actuators, B: Chemical,2017,238:204-213.
APA	Yu, J.,Cheung, K.W.,Yan, W.H.,Li, Y.X.,&Ho, D..(2017).High-sensitivity low-power tungsten doped niobium oxide nanorods sensor for nitrogen dioxide air pollution monitoring.Sensors and Actuators, B: Chemical,238,204-213.
MLA	Yu, J.,et al."High-sensitivity low-power tungsten doped niobium oxide nanorods sensor for nitrogen dioxide air pollution monitoring".Sensors and Actuators, B: Chemical 238(2017):204-213.