A numerical study of the sensitivity of surface plasmon resonance bimetallic silver-gold alloys using boundary element method

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Abstract

In this study, we have systematically investigated the sensitivity of surface plasmon resonance bimetallic silver-gold alloys by means of metallic nanoparticle simulation, MNPBEM with respect to the diameter, mole fraction, and refractive index medium variation. The sensitivity of surface plasmon resonance was obtained from a fitting linear between the value of the peak position LSPR spectra and the refractive index medium. Interestingly, it was found the sensitivity of surface plasmon resonance increased as the diameter increased for a diameter less than 40 nm, whereas the sensitivity of surface plasmon resonance exhibited the fluctuation values for diameter above 40 nm. The highest value of the sensitivity occurred at the silver mole fraction at x = 0.6 rather than at x = 1.0 (pure silver particle). This result also showed the sensitivity of surface plasmon resonance pure silver particle (x = 1) was greater than gold particle (x = 0). The sensitivity of surface plasmon resonance was not only affected by the diameter but also influenced by the mole fraction.

Original languageEnglish
Article number012016
JournalIOP Conference Series: Materials Science and Engineering
Volume188
Issue number1
DOIs
Publication statusPublished - 2 May 2017
EventInternational Symposium on Current Progress in Functional Materials 2016, ISCPFM 2016 - Bali, Indonesia
Duration: 26 Jul 201627 Jul 2016

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