Preprint Communication Version 1 Preserved in Portico This version is not peer-reviewed

Designing an Efficient Self-Assembled Plasmonic Nanostructures from Spherical Shaped Nanoparticles

Version 1 : Received: 13 September 2021 / Approved: 14 September 2021 / Online: 14 September 2021 (08:45:05 CEST)

How to cite: Devaraj, V.; Lee, J.; Kim, Y.; Jeong, H.; Oh, J. Designing an Efficient Self-Assembled Plasmonic Nanostructures from Spherical Shaped Nanoparticles. Preprints 2021, 2021090225 (doi: 10.20944/preprints202109.0225.v1). Devaraj, V.; Lee, J.; Kim, Y.; Jeong, H.; Oh, J. Designing an Efficient Self-Assembled Plasmonic Nanostructures from Spherical Shaped Nanoparticles. Preprints 2021, 2021090225 (doi: 10.20944/preprints202109.0225.v1).

Abstract

We reveal the significance of plasmonic nanoparticle’s (NP) shape and its surface morphology en route to an efficient self-assembled plasmonic nanoparticle cluster. A simplified model is simulated in the form of free-space dimer and trimer nanostructures (NPs in shape of sphere, cube, and disk). A ~ 200 % to ~ 125% raise in near field strength (gap mode enhancement) is observed for spherical NPs in comparison with cubical NPs (from 2 nm to 8 nm gap sizes). Full-width three-quarter maximum reveals better broad-spectral optical performance in a range of ~ 100 nm (dimer) and ~ 170 nm (trimer) from spherical NPs as compared to a cube (~ 60 nm for dimer and trimer). These excellent properties for sphere-based nanostructures are merited from its dipole mode characteristics.

Keywords

Self-assembly; Metallic nanoparticles; Plasmonic modes; Simulations; Surface charge mappings; Full-width three-quarter maximum

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