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dc.contributor.authorLi, Xianglinen
dc.contributor.authorWang, Zhiweien
dc.contributor.authorShen, Zexiangen
dc.contributor.authorTan, Chiew Keien
dc.contributor.authorTok, Alfred Iing Yoongen
dc.identifier.citationLi, X., Wang, Z., Tan, C. K., Shen, Z., & Tok, A. I. Y. (2019). Ordered array of metal particles on semishell separated with ultrathin oxide : fabrication and SERS properties. Coatings, 9(1), 20-. doi:10.3390/coatings9010020en
dc.description.abstractMetal particles in gap cavities provide an interesting system to achieve hybrid local surface plasmon modes for local field enhancement. Here, we demonstrate a relatively simple method to fabricate Ag nanoparticles positioned on Ag semishells separated by a thin (~5 nm) dielectric layer. The obtained structure can provide strong local electric field enhancement for surface-enhanced Raman scattering (SERS). The fabrication of the ordered array structure was realized by nanosphere self-assembly, atomic layer deposition, and metal thin-film dewetting. Numerical simulation proved that, compared to the conventional metal semishell arrays, the additional Ag particles introduce extra hot spots particularly in the valley regions between adjacent Ag semishells. As a result, the SERS enhancement factor of the metal semishell-based plasmonic structure could be further improved by an order of magnitude. The developed novel plasmonic structure also shows good potential for application in plasmon-enhanced solar water-splitting devices.en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent10 p.en
dc.rights© 2018 The Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
dc.subjectSurface Plasmonicen
dc.subjectSurface-enhanced Raman Scatteringen
dc.titleOrdered array of metal particles on semishell separated with ultrathin oxide : fabrication and SERS propertiesen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science & Engineeringen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.description.versionPublished versionen
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