FDTD simulations of local plasmonic fields for core-shell rod-shaped gold-based nanoparticles
Andrey Y. Zyubin, 1 Igor Kon, 1 Ilia Samusev, 1
1 Immanuel Kant Baltic Federal University
Abstract
The paper describes the results of finite-difference time-domain (FDTD) mathematical modeling of electric fields distortion near the surfaces of core-shell gold-based rod-shaped gold nanoparticles (NPs). NPs of varied sizes were consistently functionalized with SiO2 shells of different thicknesses. Theoretical E value for the calculated field was converted into the EM field enhancement coefficient and the surface-enhanced Raman scattering (SERS) intensity. The calculated algorithm was demonstrated. Prospects of the theoretical approach for core-shell NPs modeling to evaluate optimal field amplification and light-scattering parameters have been shown. The presented approach could be applied as a basis for performing methods of controlled synthesis for colloidal core-shell theranostic NPs.
The work was supported under a grant of Ministry of Science and Higher Education № 075-02-2021-1748
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Andrey Zyubin
Immanuel Kant Baltic Federal University
Russia
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