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Findings in Physics Research Reported from Hanyang University (Self-assembled Diatom Substrates with Plasmonic Functionality)

July 1, 2014

By a News Reporter-Staff News Editor at Physics Week -- Current study results on Physics Research have been published. According to news reporting originating in Seoul, South Korea, by VerticalNews journalists, research stated, "Marine diatoms have an exquisitely complex exoskeleton that is promising for engineered surfaces such as sensors and catalysts. For such applications, creating uniform arrays of diatom frustules across centimeter scales will be necessary."

The news reporters obtained a quote from the research from Hanyang University, "Here, we present a simple, low-cost floating interface technique to self-assemble the diatom frustules. We show that well-prepared diatoms form floating hexagonal close-packed arrays at the air-water interface that can be transferred directly to a substrate. We functionalize the assembled diatom surfaces with gold and characterize the plasmonic functionality by using surface enhanced Raman scattering (SERS). Thin gold films conform to the complex, hierarchical diatom structure and produce a SERS enhancement factor of 2 x 10(4). Small gold nanoparticles attached to the diatom's surface produce a higher enhancement of 7 x 10(4) due to stronger localization of the surface plasmons."

According to the news reporters, the research concluded: "Taken together, the large-scale assembly and plasmonic functionalization represent a promising platform to control the energy and the material flows at a complex surface for applications such as sensors and plasmonic enhanced catalysts."

For more information on this research see: Self-assembled Diatom Substrates with Plasmonic Functionality. Journal of the Korean Physical Society, 2014;64(8):1179-1184. Journal of the Korean Physical Society can be contacted at: Korean Physical Soc, 635-4, Yuksam-Dong, Kangnam-Ku, Seoul 135-703, South Korea. (Springer -; Journal of the Korean Physical Society -

Our news correspondents report that additional information may be obtained by contacting S.Y. Kwon, Hanyang University, Div Mat Sci & Engn, Seoul 133791, South Korea. Additional authors for this research include S. Park and W.T. Nichols.

Keywords for this news article include: Asia, Seoul, South Korea, Physics Research

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Source: Physics Week

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