Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Plasmonic Properties of Bimetallic Quantum Dot [email protected] Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium

Version 1 : Received: 15 April 2021 / Approved: 16 April 2021 / Online: 16 April 2021 (10:45:14 CEST)

How to cite: Kassahun, G.B.B. Plasmonic Properties of Bimetallic Quantum Dot [email protected] Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium. Preprints 2021, 2021040435 (doi: 10.20944/preprints202104.0435.v1). Kassahun, G.B.B. Plasmonic Properties of Bimetallic Quantum Dot [email protected] Core-Shell Nanostructures Embedded in Non-Absorptive Host Medium. Preprints 2021, 2021040435 (doi: 10.20944/preprints202104.0435.v1).

Abstract

This studies the plasmonic properties of the bimetallic quantum dot [email protected] core-shell nanostructures embedded in the non-absorbent host medium. Local field enhancement factor and coefficient of absorption of Ag-core and Au-shell are primarily studied based on quasi-static approximation of classical electrodynamics for 6-10 nm composite radius. In this quantum dot geometry, two set of plasmonic resonances in visible spectral region are observed: the first resonance associated with inner interface of gold ([email protected]) and the second resonance associated with outer interface of gold ([email protected]). The two plasmonic resonances are close each other and enhanced when the size of composite decreased for a fixed core size while shifted to in opposite direction and the amplitude of peak decreased when the core size is increased for a fixed composite size. For the optimized size of core/composite or shell thickness and other parameters to the desired values, such type of composites are recommended for various applications like; photocatalysis, biomedical, nano-optoelectronics.

Subject Areas

Core-Shell; Spacer; Host-Medium; Bimetallic; Enhancement Factor; Dielectrics Function

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