Study of Detection Mechanism for Optically Readable Hydrogen Sensor

光可读氢传感器检测机理的研究

• 批准号: 13305060
• 负责人: TAKATA Masasuke
• 金额: $ 27.29万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13305060/
• 关键词: Hydrogen sensor; Paradium; Optical characteristics; Optical sensing; Spectroscopic ellipsometry; Durability; Sensitivity; Response; recovery; 室温作動; 光検知方式; 接合界面; バッファー層; ステアリン酸; Pd薄膜; パターン化; ポリエチレンテレフタレート; ポリカーボネート; 室温作動型; Pd; Y薄膜; Mg薄

To use hydrogen as a clean energy resource, it is essential to develop devices for detection of its leakage because hydrogen is explosive with wide range of concentration and low ignition energy. An optically readable hydrogen sensor is one of the most feasible candidates because of its excellent characteristics at room temperature and high safety. The sensor consists of a thin film of catalytic metal such as palladium(Pd) deposited on the glass substrate or the optical fiber end, and the change in optical properties of the film during hydrogenation is utilized for the hydrogen detection. This project was aimed at investigating the detection mechanism of the optically readable hydrogen sensor in order to improve the sensitivity, response/recovery property and the durability. The following results were obtained from the research.(1)The patterned Pd film on the glass substrate exhibited high sensitivity and durability. The sensitivity increased gradually with increasing hydrogen absorpti … More on-desorption cycle.(2)The Pd films on the polyethyleneterephthalate(PET) and polycarbonate(PC) substrates showed stable sensitivity compared to the film on glass substrate. The recovery time of the Pd/PET increased with increasing cycle. On the other hand, the Pd/PC sample had the stable repetition characteristic. From these results, it turned out that substrate material influenced the sensing characteristics.(3)The Pd/Y double-layered thin films had a great advantage of high sensitivity compared with the Pd film. The recovery time was controllable by controlling the thickness of Pd film.(4)The sensitivity of the Pd/Mg doubter-layered thin films was higher than that of Pd/Y films. From the optical measurement by spectroscopic ellipsometry, a considerable change in the dielectric function of the Pd/Mg film in hydrogen atmosphere was observed. The change suggested the decrease in the free electron density and the appearance of polarized electrons in hydrogen atmosphere.(5)The influence of Stearic Acid(SA) buffer layer on the durability and the sensitivity of an optically readable hydrogen sensor using Pd/SA/glass was investigated. The Pd/SA films showed high durability and sensitivity even after repeated hydrogen detection. Less

氢气具有爆炸性、浓度范围广、点火能量低等特点，因此，开发氢气泄漏检测装置是实现氢气清洁能源利用的关键。光学可读氢传感器由于其优良的室温特性和高安全性而成为最可行的候选者之一。该传感器由沉积在玻璃基底或光纤端部上的催化金属（例如钯（Pd））的薄膜组成，并且该膜在氢化期间的光学性质的变化用于氢检测。本计画旨在探讨光读式氢感测器之侦测机制，以改善其灵敏度、响应/恢复特性及耐久性。从研究中获得了以下结果。（1）玻璃基板上的图案化Pd膜表现出高灵敏度和耐久性。随着吸氢量的增加，灵敏度逐渐增加。 ...更多信息 解吸循环（2）在PET和PC基底上制备的Pd膜比在玻璃基底上制备的Pd膜具有更稳定的灵敏度。Pd/PET的恢复时间随着循环的增加而增加。另一方面，Pd/PC样品具有稳定的重复性。从这些结果，它证明，基板材料影响的传感特性。（3）Pd/Y双层膜具有灵敏度高的优点。通过控制Pd膜的厚度可以控制恢复时间。（4）Pd/Mg双层膜的灵敏度高于Pd/Y双层膜。从椭圆偏振光谱的光学测量，在氢气氛中的Pd/Mg膜的介电函数的一个相当大的变化被观察到。这种变化表明氢气氛中自由电子密度降低，出现极化电子。（5）研究了硬脂酸（SA）缓冲层对Pd/SA/glass光读氢传感器耐久性和灵敏度的影响。Pd/SA膜具有高的耐久性和灵敏度，即使在重复氢检测。少

项目成果

Y.Imai, J.Mercado, T.Okamoto, M.Takata: "Study on Optically Readable Hydrogen Sensor Consisting of Pd/Mg Thin Films by Spectroscopic Ellipsometry"Key Engineering Materials. 216. 101-104 (2002)

Y.Imai，J.Mercado，T.Okamoto，M.Takata：“利用光谱椭圆光法研究由Pd/Mg薄膜组成的光学可读氢传感器”关键工程材料。

Y.Imai, T.Okamoto, M.Takata: "Study on Optically Readable Hydrogen Sensor Consisting of Pd/Mg Thin Films by Spectroscopic Ellipsometry"Key Engineering Materials. 216. 101-104 (2002)

Y.Imai、T.Okamoto、M.Takata：《利用光谱椭圆光法研究Pd/Mg薄膜光学可读氢传感器》关键工程材料。

Y.Imai, Y.Okuhara, Y.Noguchi, M.Takata: "Optically Readable Hydrogen Sensor Using Pd/Y Double-layered Thin Films"Advances in Technology of Materials and Materials Processing Journal. 6[1]. 57-62 (2004)

Y.Imai、Y.Okuhara、Y.Noguchi、M.Takata：“使用 Pd/Y 双层薄膜的光学可读氢传感器”材料技术进展和材料加工杂志。

K.Tanaka, T.Okamoto, M.Takata: "Patterning of Pd Thin Film for Optical Hydrogen Sensor by R.F.Magnetron Sputtering Method"(投稿予定). (2004)

K.Tanaka、T.Okamoto、M.Takata：“通过 R.F.磁控管溅射法对光学氢传感器的 Pd 薄膜进行图案化”（待提交）（2004 年）。

Y.Okuhara, Y.Imai, Y Noguchi, M.Takata: "Accelerative Hydrogen Desorption from Palladium Hydride for Responsive Optical Hydrogen Sensor"(in preparation for publication).

Y.Okuhara、Y.Imai、Y Noguchi、M.Takata：“响应式光学氢传感器的氢化钯加速氢解吸”（准备出版）。