Investigation of the thermally generated Au/Ag nanoislands for SERS and LSPR applications

Istvan Csarnovics

doi:10.1117/12.2596929

1 August 2021 Investigation of the thermally generated Au/Ag nanoislands for SERS and LSPR applications

Istvan Csarnovics

Proceedings Volume 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX; 117970J (2021) https://doi.org/10.1117/12.2596929
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

In this work, the performance of Au/Ag nanoislands was investigated for SERS and LSPR applications. The nanoislands were generated by thermally annealing thin layers of silver and gold, which were previously sputtered onto glass surfaces. Pure metallic (silver and gold nanoparticles – AuNP and AgNP) system was evaluated based on their plasmonic and SERS sensitivity. The sensitivity of LSPR and SERS based devices are strongly depending on the used material and also on the size and geometry of the metallic nanoparticles. By controlling these parameters the plasmon absorption band can be tuned and the sensitivity can be optimized. It was found that the enhancement factor (which characterizes the increase in the peak shift for multi-particle arrangements compared to single-particle models) depends on the size of the nanoparticles and on the distance between the particles. The efficiency can be maximized by increasing the nanoisland size, and by reducing the particle distance.

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Istvan Csarnovics "Investigation of the thermally generated Au/Ag nanoislands for SERS and LSPR applications", Proc. SPIE 11797, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIX, 117970J (1 August 2021); https://doi.org/10.1117/12.2596929

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KEYWORDS

Surface enhanced Raman spectroscopy

Nanoparticles

Gold

Silver

Annealing

Glasses

Particles

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