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Abstract
Plasmonic nanostructures possessing broadband intense field enhancement over a large area are highly desirable for nanophotonic and plasmonic device applications. In this study, 3D Ag hybrid nanoaggregates (3D-Ag-HNAs) are achieved via a highly efficient oblique angle gas-phase cluster beam deposition method. Not only can such structures produce a high density of plasmonic hot-spots to improve Raman sensitivity, but more importantly they generate kissing point-geometric singularities with a broadband optical response. We succeed in obtaining an experimental SERS enhancement factor beyond 4 × 107 in the visible range, providing an optimal sensing platform for different analytes. Combined with good uniformity, reproducibility and ease of fabrication, our 3D-Ag-HNA offers a candidate for new generations of SERS systems.
Original language | English |
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Pages (from-to) | 93-102 |
Number of pages | 10 |
Journal | Nanoscale |
Volume | 12 |
Issue number | 1 |
Early online date | 14 Oct 2019 |
DOIs | |
Publication status | Published - Jan 2020 |
ASJC Scopus subject areas
- Materials Science(all)
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