Long-term measurements of SPR hydrogen sensor based on hetero-core optical fiber with Au/Ta2O5/Pd/Au multilayers

Ken Takahashi; Ai Hosoki; Michiko Nishiyama; Hirotaka Igawa; Kazuhiro Watanabe

doi:10.1117/12.2210826

16 March 2016 Long-term measurements of SPR hydrogen sensor based on hetero-core optical fiber with Au/Ta₂O₅/Pd/Au multilayers

Ken Takahashi, Ai Hosoki, Michiko Nishiyama, Hirotaka Igawa, Kazuhiro Watanabe

Author Affiliations +

Proceedings Volume 9754, Photonic Instrumentation Engineering III; 975415 (2016) https://doi.org/10.1117/12.2210826
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

Demands for a hydrogen fuel has been increased due to usages as an ecological and alternative energy resource. On the other hand, hydrogen easily causes an explosion above concentrations of 4 % in air, hence hydrogen sensors are need to have rapidity and accuracy for detecting hydrogen. Conventional hydrogen sensors have mainly used palladium (Pd) which is known as a hydrogen detecting material with high sensitivities and selectivity to hydrogen. Generally, Pd absorbs hydrogen in large amounts and forms Pd hydride, moreover, Pd experiences α-β phase transition during volume change of Pd with hydrogen absorption. As a result, the volume change of Pd induces a deterioration which affects time responses and sensitivities of hydrogen sensors. To keep Pd from deteriorating, alloying Pd with metals, such as Au and Ag, has been utilized as preventing Pd from experiencing α-β phase transition. In this paper, we propose a hetero-core optical fiber hydrogen sensor based on surface plasmon resonance (SPR) with multi-layers of Au/Ta₂O₅/Pd/Au in order to suppress the deterioration of Pd. A few sensors were prepared with the same construction of sensitive film 25-nm Au/ 60-nm Ta₂O₅/ thicknesses with stacks of annealed 3 double layers of 1.4-nm Pd and 0.6-nm Au or 5-nm pure Pd, and evaluated in terms of the time response and sensitivities. The response times at the 1st and the 15th hydrogen absorption test were experimentally observed to be from 3 s to 6 s for annealed Pd-Au, in contrast, to be from about 16 s to 22 s for pure Pd at 4 % hydrogen concentration, respectively.

Citation Download Citation

Ken Takahashi, Ai Hosoki, Michiko Nishiyama, Hirotaka Igawa, and Kazuhiro Watanabe "Long-term measurements of SPR hydrogen sensor based on hetero-core optical fiber with Au/Ta₂O₅/Pd/Au multilayers", Proc. SPIE 9754, Photonic Instrumentation Engineering III, 975415 (16 March 2016); https://doi.org/10.1117/12.2210826

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Hydrogen

Sensors

Palladium

Fiber optics sensors

Optical fibers

Gold

Thin films

Show All Keywords

Keywords/Phrases

Search In:

Publication Years