2020/07/22 by Lasse Kragh Sørensen, Lasse K. Sørensen, Anton D. Utyushev +6
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Advanced Materials Characterization Techniques #Advanced Theoretical and Applied Studies in Material Sciences and Geometry #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Optics (physics.optics) #cond-mat.mes-hall #nanoparticles nucleation surface interactions #physics.optics
paper · pdf · doi:10.48550/arxiv.2007.11688
11 pages, 18 figures
arxiv created 2020/07/22 · openalex publication_date 2020/07/22 · arxiv updated 2020/07/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using the extended discrete interaction model we investigate the tuneabilty of surface plasmon resonance in alloys and core-shell nanoparticles made from silver and gold. We show that the surface plasmon resonance of these alloys and core-shell particles to a large extent follow Vegard's law irrespective of the geometry of the nanoparticle. We show the evolution of the polarizability with size and demonstrate the highly non-linear behaviour of the polarizability with the ratio of the constituents and geometry in alloys and core-shell nanoparticles, with the exception for nanorod alloys. A thorough statistical investigation reveals that there is only a small dependence of the surface plasmon resonance on atomic arrangement and exact distribution in a nanoparticle and that the standard deviation decrease rapidly with the size of the nanoparticles. The physical reasoning for the random distribution algorithm for alloys in discrete interaction models is explained in details and verified by the statistical analysis.