Sensors and Materials

We will celebrate the 30th anniversary of Sensors and Materials in 2018.
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Nitric Oxide Gas Sensors Using a Multilayered Thin Film with Interspaces

Akihiro Shimizu, Tsubasa Morita, Tomiharu Yamaguchi, and Kazuhiro Hara

(Received December 4, 2017; Accepted April 10, 2018)

Keywords: NO gas sensor, WO3 thin film, Ag catalyst, interspace, multiple-layered configuration

Nitric oxide (NO) is an air pollutant known to adversely affect the environment, humans, and other living organisms. Low-level NO gas is also created by human bodies and emitted as a component of exhaled breath and skin gas under some health conditions. Therefore, there is a strong demand for the monitoring of NO gas concentration. In this paper, we present novel NO gas sensors that have been developed using multilayered WO3-based thin films with interspaces. Ag doping into a WO3 thin film is effective in increasing the sensitivity to NO. Multilayered thin-film sensors with interspaces successfully enhance both sensitivity and selectivity to NO. The developed sensor with quadruple-layered sensing films can detect as low as 0.5 ppm NO gas with good selectivity at an operating temperature of 290 ℃. The response and recovery times are 81 and 138 s, respectively, for the double-layered sensor, while its sensitivity is lower than that of the quadruple-layered sensor. Thus, the sensors are promising as a portable and inexpensive NO sensing device in various application fields such as environmental monitoring and health diagnosis.

Corresponding author: Tomiharu Yamaguchi




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Forthcoming Special Issues

Special Issue on Materials, Devices, Circuits, Analytical Methods for Various Sensors (Selected Papers from ICSEVEN 2017)
Guest editor, Chien-Jung Huang (National University of Kaohsiung), Chi-Chih Liao (II-V Epiworks, Inc.), and Ja-Hao Chen (Feng Chia University)
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Special Issue Dedicated to Professor Toshitsugu Ueda for His Achievements in Sensing Technologies
Guest editor, Satoshi Ikezawa (Waseda University) and Jinxing Liang (Southeast University)


Special Issue on Micro Energy Harvesting and Storing Technologies
Guest editor, Bin Yang (Shanghai Jiao Tong University); Submission deadline, extended to March 20, 2018
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Special Issue on Internet of Things (IoT) and Applications for Improving Quality of Life
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Special Issue on the International Multi-Conference on Engineering and Technology Innovation 2017 (IMETI2017)
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4th Special Issue on the Workshop of Next-Generation Front-Edge Optical Science Research
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Special Issue on Sensors and Materials for Cyber-Physical Applications
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Special Issue on Innovative and Intelligent Sensing Analysis and Experiment for Functional Materials
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Special Issue on Biosensing Materials and Engineering for Electrobiology
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Special Issue on Advances in Devices and Materials for Stress-Strain Sensing
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Special Issue on Remote Sensing and Sensing Devices
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Special Issue on International Conference on BioSensors, BioElectronics, BioMedical Devices, BioMEMS/NEMS and Applications 2017 (Bio4Apps 2017)
Guest editor, Toshihiro Itoh (The University of Tokyo); Submission deadline, May 15, 2018
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Special Issue on Nanostructure and Its Application in Sensors
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Special Issue on Micro/Nano Sensing Platforms Exploring Biomedical Innovation
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Special Issue on Mechanical and Thermal Reliability of Micro/Nanomaterials
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Special Issue on Universal Power Supply Technologies for Trillion Sensors Era
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Special Issue on the Workshop on Sensors and Applications for Fishery and Agricultural Industries
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Special Issue on Selected Papers from ICASI2018
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Special Issue on the International Multi-Conference on Engineering and Technology Innovation 2018 (IMETI2018)
Guest editor, Wen-Hsiang Hsieh (National Formosa University)
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Special Issue on Materials, Devices, Circuits, Analytical Methods for Various Sensors (Selected Papers from ICSEVEN 2018)
Guest editor, Chien-Jung Huang (National University of Kaohsiung), Chi-Chih Liao (II-V Epiworks, Inc.), and Ja-Hao Chen (Feng Chia University)
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Special Issue on Carbon Material-based Chemical and Biochemical Sensors
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