Self-assembled plasmonic nanoring cavity arrays are formed alongside the curvature of highly packed metallic nanosphere gratings. The sub-10-nm gap size is precisely tuned via atomic layer deposition and highly ordered arrays are produced over a centimeter-sized area. The resulting hybrid nanostructure boosts coupling efficiency of light into plasmons, and shows improved SERS detection limit. Further details can be found on page 2678 in the article by Sang-Hyun Oh, Christy L. Haynes, and co-workers.
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