Lightning-Rod Effect of Plasmonic Field Enhancement on Hydrogen-Absorbing Transition Metals
Department of Chemical Engineering, Kyoto University, Kyoto 615-8510, Japan
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Nanomaterials 2019, 9(9), 1235; https://doi.org/10.3390/nano9091235
Received: 1 August 2019
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Revised: 26 August 2019
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Accepted: 27 August 2019
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Published: 30 August 2019
(This article belongs to the Special Issue Dynamics and Applications of Photon-Nanostructured Systems)
The plasmonic enhancement of electromagnetic field energy density at the sharp tips of nanoparticles or nanoscale surface roughnesses of hydrogen-absorbing transition metals, Pd, Ti, and Ni, is quantitatively investigated. A large degree of energy focusing is observed for these transition metals in the microwave region, even surpassing the enhancement for noble metals according to the conditions. Pd, for instance, exhibits peak field enhancement factors of 6000 and 2 × 108 in air for morphological aspect ratios of 10 and 100, respectively. Metal surfaces possibly contain such degrees of nano- or micro-scale native random roughnesses, and, therefore, the field enhancement effect may have been unknowingly produced in existing electrical and optical systems. In addition, for future devices under development, particularly in hydrogen-related applications, it is desirable to design and optimize the systems, including the choice of materials, structures, and operating conditions, by accounting for the plasmonic local energy enhancement effect around the metal surfaces.
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Keywords:
transition metal; surface plasmon; nanoparticle; nanophotonics; hydrogen storage; sensing; nuclear fusion; energy device
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MDPI and ACS Style
Fukuoka, N.; Tanabe, K. Lightning-Rod Effect of Plasmonic Field Enhancement on Hydrogen-Absorbing Transition Metals. Nanomaterials 2019, 9, 1235. https://doi.org/10.3390/nano9091235
AMA Style
Fukuoka N, Tanabe K. Lightning-Rod Effect of Plasmonic Field Enhancement on Hydrogen-Absorbing Transition Metals. Nanomaterials. 2019; 9(9):1235. https://doi.org/10.3390/nano9091235
Chicago/Turabian StyleFukuoka, Norihiko, and Katsuaki Tanabe. 2019. "Lightning-Rod Effect of Plasmonic Field Enhancement on Hydrogen-Absorbing Transition Metals" Nanomaterials 9, no. 9: 1235. https://doi.org/10.3390/nano9091235
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