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Nanogap-Engineered Core-Shell-Like Nanostructures for Comprehensive SERS Analysis by Suster, Mihai C.; Szymańska, Aleksandra; Antosiewicz, Tomasz J.; Królikowska, Agata; Wróbel, Piotr is a scholarly article available to read on EtoBox.

What is Nanogap-Engineered Core-Shell-Like Nanostructures for Comprehensive SERS Analysis about?

Development of fabrication protocols for large-area plasmonic nanostructures with sub-10 nm gaps with a spatially controlled distribution is critical for their real-world applications. In this work, we develop a simple, cleanroom-free protocol for the fabrication of macroscopic-sized plasmonic substrates (>6 cm^2), featuring a tunable multi-resonance optical response and light concentration in sub-10 nm gaps. Critically, these gaps are free to interact with the surrounding medium. This architecture consists of non-periodically distributed dielectric nanospheres coated with a metal multilayer, forming semi-spherical core-shell-like nanostructures (CSLNs) surrounded by a planar film. The sub-10 nm gaps formed between metal caps and the planar film are easily tuned by adjusting fabrication parameters such as multimetal layer thickness, composition, or nanosphere size and density. The excellent structural homogeneity, wide optical tunability, and extreme light confinement in the spatially controlled subwavelength nanogaps make CSLN-based substrates an ideal platform for comprehensive surface-enhanced Raman scattering (SERS) spectroscopy. This is proven through a combination of numerica

Author

Suster, Mihai C.; Szymańska, Aleksandra; Antosiewicz, Tomasz J.; Królikowska, Agata; Wróbel, Piotr

Published

2024

Language

EN