Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7145722 | Sensors and Actuators B: Chemical | 2015 | 7 Pages |
Abstract
A highly sensitive hydrogen gas sensor based on a fiber Bragg grating (FBG) has been developed. Various potential hydrogen sensor materials were screened by assessing the catalytic activities of oxide-supported platinum particles prepared by a sol-gel method. It was determined that a Pt/SiO2 film was the most appropriate sensor material; exposure of this film to 4Â vol% H2 in humid air for 30Â s at room temperature produced a temperature change of 65Â K. In addition, the Pt/SiO2 was able to respond to a concentration as low as 0.1Â vol% H2 in dry air. Two types of sensor structures were fabricated and evaluated. The device incorporating a quartz glass substrate covered with the sensor film on one side was able to detect 0.4Â vol% H2 in dry air at room temperature with a response time of approximately 25Â min. The other device, in which the sensor film was immobilized on the periphery of the FBG section, exhibited rapid response to 0.6Â vol% H2 within 20Â s.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Satoshi Masuzawa, Shinji Okazaki, Yusuke Maru, Tadahito Mizutani,