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.
To submit your manuscript, please use our Online Manuscript Submission System
To subscribe to Sensors and Materials, please contact us.
Sensors and Materials
is covered by Science Citation Index Expanded
(Thomson Reuters), Scopus
(Elsevier), and other databases.
General Notes on Format
Sensors and Materials
Bunkyo-ku, Tokyo 113-0022, Japan
Cover of latest issue
provides English proofreading, translation, and recording services for your submissions and presentations. The quality of the services is highly regarded by many researchers in Japan and other Asian countries.
(proofreading and recording)
The Art of Writing Scientific Papers
(How to write scientific papers)
Sensors and Materials,
Volume 29, Number 9(1) (2017)
Copyright(C) MYU K.K. All Rights Reserved.
Published: September 6, 2017
Optimization of Hydrogen Sensing Performance of Pt/WO3 Gasochromic Film Fabricated by the Sol–Gel Method
Hajime Takahashi, Shinji Okazaki, Yoshiaki Nishijima, and Taro Arakawa
(Received February 28, 2017; Accepted May 9, 2017)
Keywords: hydrogen gas sensor, platinum-supported tungsten trioxide, gasochromism, optical transmittance change
The sensing performance of a sol–gel-derived Pt/WO3 film used in an optical hydrogen gas sensor was evaluated and optimized. The Pt/WO3 film was deposited on a quartz glass substrate by the sol–gel method based on the acidification of Na2WO3 aqueous solutions. Optical transmittance changes of the films as a result of exposure to hydrogen-containing gas were measured in the near-infrared region. The sensor performance was severely affected by fabrication parameters such as annealing conditions, precursor concentration, and catalyst loading. In the case of annealing at 500 °C, high sensitivity and fast response were obtained. An annealing time of at least 0.5 h was required to attain stable performance, and long annealing times had no effect on the sensitivity. However, the sensor performance and transparency of the film became poorer in the case of a ratio of over 0.4. The atomic ratio of Pt to W showed a considerable effect on the sensing characteristics. Both the sensitivity and response kinetics were promoted with increasing Pt loading. When the ratio was about 0.35, maximum sensitivity was observed. The concentration of the Na2WO4 solution used in the sol–gel process was also an important parameter. The sensitivity increased with increasing concentration since the thickness of the sensing film increased. The dependence of response speed on concentration was larger than that of recovery speed. When the film was exposed to H2/N2 gas, good response was observed; the hydrogen detection limit was about 0.001 vol% and minimal influence of water vapor was noted. The sensing performance, however, became poorer because oxygen inhibited the reaction when the film was exposed to hydrogen-containing air.
Corresponding author: Shinji Okazaki
Forthcoming Regular Issues
Forthcoming Special Issues
Special Issue on Advanced Sensing Technology for Smart Manufacturing
Guest editor, Chien-Hung Liu (National Chung Hsing University)Special Issue on International Conference on BioSensors, BioElectronics, BioMedical Devices, BioMEMS/NEMS and Applications 2016 (Bio4Apps 2016)
Guest editor, Dzung Dao (Griffith University)Call for paperSpecial Issue on Retinal Prosthesis
Guest editor, Jun Ohta (Nara Institute of Science and Technology), Hiroyuki Tashiro (Kyusyu University), and Yasuo Terasawa (Nidek Co., Ltd.)Call for paperSpecial Issue on Innovative and Intelligent Sensing Analysis and Experiment for Functional Materials
Guest editor, Cheng-Chi Wang (National Chin-Yi University of Technology)Conference websiteSpecial Issue on ICASI2017
Guest editor, Teen-Hang Meen (National Formosa University), Shoou-Jinn Chang National Cheng Kung University), and Stephen D. Prior (University of Southampton)Conference websiteCall for paperSpecial Issue on Open Collaboration for MEMS
Guest editor, Masayoshi Esashi (Tohoku University)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)Conference websiteCall for paperSpecial 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 the International Multi-Conference on Engineering and Technology Innovation 2017 (IMETI2017)
Guest editor, Wen-Hsiang Hsieh (National Formosa University)Conference websiteSpecial Issue on Sensors and Materials for Cyber-Physical Applications
Guest editor, Pitikhate Sooraksa (King Mongkut’s Institute of Technology Ladkrabang)Call for paperSpecial Issue on Biosensing Materials and Engineering for Electrobiology
Guest editor, Toshiya Sakata (The University of Tokyo)Call for paperSpecial Issue on Micro Energy Harvesting and Storing Technologies
Guest editor, Bin Yang (Shanghai Jiao Tong University)Call for paperSpecial Issue on Internet of Things (IoT) and Applications for Improving Quality of Life
Guest editor, Hidetaka Nambo (Kanazawa University)Call for paperSpecial Issue on Advances in Devices and Materials for Stress-Strain Sensing
Guest editor, Toshiyuki Toriyama and Taeko Ando (Ritsumeikan University)Call for paperSpecial Issue on Remote Sensing and Sensing Devices
Guest editor, Haruichi Kanaya (Kyushu University)Call for paperSpecial Issue on International Conference on BioSensors, BioElectronics, BioMedical Devices, BioMEMS/NEMS and Applications 2017 (Bio4Apps 2017)
Guest editor, Toshihiro Itoh (The University of Tokyo)Conference websiteSpecial Issue on Nanostructure and Its Application in Sensors
Guest editor, Tie Li (Shanghai Institute of Microsystem and Information Technology)Call for paperSpecial Issue on Micro/Nano Sensing Platforms Exploring Biomedical Innovation
Guest editor, Ryoji Kurita (National Institute of Advanced Industrial Science and Technology)Call for paperSpecial Issue on Selected Papers from ICASI2018
Guest editor, Teen-Hang Meen (National Formosa University), Shoou-Jinn Chang National Cheng Kung University), and Stephen D. Prior (University of Southampton)Conference websiteCall for paper