Au-Ag-Cu Nano-alloys: Tailoring of Permittivity

Overview

Journal Sci Rep

Specialty Science

Date 2016 Apr 28

PMID 27118459

Citations 16

Authors

Yoshikazu Hashimoto

Gediminas Seniutinas

Armandas Balcytis

Saulius Juodkazis

Yoshiaki Nishijima

Affiliations

Soon will be listed here.

Abstract

Precious metal alloys enables new possibilities to tailor materials for specific optical functions. Here we present a systematic study of the effects of a nanoscale alloying on the permittivity of Au-Ag-Cu metals at 38 different atomic mixing ratios. The permittivity was measured and analyzed numerically by applying the Drude model. X-ray diffraction (XRD) revealed the face centered cubic lattice of the alloys. Both, optical spectra and XRD results point towards an equivalent composition-dependent electron scattering behavior. Correlation between the fundamental structural parameters of alloys and the resulting optical properties is elucidated. Plasmonic properties of the Au-Ag-Cu alloy nanoparticles were investigated by numerical simulations. Guidelines for designing plasmonic response of nano- structures and their patterns are presented from the material science perspective.

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