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

International Symposium on Current Progress in Functional Materials

Putra, M.H.^1 ; Djuhana, D.^1 ; Fauzia, V.^1 ; Harmoko, A.^1 ; Imawan, C.^1

Department of Physics, Faculty of Mathematics, Natural Sciences Universitas Indonesia, Kampus UI Depok, Depok

16424, Indonesia^1

关键词: Gold particles;    Metallic nanoparticles;    Mole fraction;    Peak position;    Silver particles;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/188/1/012016/pdf
DOI  :  10.1088/1757-899X/188/1/012016

来源: IOP

【 摘 要 】

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.