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Hysteresis-Free Nan...
Hysteresis-Free Nanoplasmonic Pd-Au Alloy Hydrogen Sensors
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- Wadell, Carl, 1985 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Nugroho, Ferry, 1986 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Lidström, Emil (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Iandolo, Beniamino, 1985 (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Wagner, Jakob B. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Langhammer, Christoph, 1978 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2015-04-30
- 2015
- English.
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In: Nano Letters. - : American Chemical Society (ACS). - 1530-6992 .- 1530-6984. ; 15:5, s. 3563-3570
- Related links:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The recent market introduction of hydrogen fuel cell cars and the prospect of a hydrogen economy have drastically accelerated the need for safe and accurate detection of hydrogen. In this Letter, we investigate the use of arrays of nanofabricated Pd-Au alloy nanoparticles as plasmonic optical hydrogen sensors. By increasing the amount of Au in the alloy nanoparticles up to 25 atom %, we are able to suppress the hysteresis between hydrogen absorption and desorption, thereby increasing the sensor accuracy to below 5% throughout the investigated 1 mbar to 1 bar hydrogen pressure range. Furthermore, we observe an 8-fold absolute sensitivity enhancement at low hydrogen pressures compared to sensors made of pure Pd, and an improved sensor response time to below one second within the 0-40 mbar pressure range, that is, below the flammability limit, by engineering the nanoparticle size.
Subject headings
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Keyword
- Hydrogen sensing
- palladium
- localized surface plasmon resonance
- plasmonic sensing
- alloy nanoparticles
Publication and Content Type
- art (subject category)
- ref (subject category)
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