Abstract

Sara Mohammadi Bilankohi

DOI : http://dx.doi.org/10.13005/ojc/31.Special-Issue1.35

Optical properties of platinum and platinum/silica core/shell nanospheres are studied based on simulation. The numerical simulation results show that optical properties of platinum and platinum/silica core/shell nanospheres are mainly dependent on their sizes and refractive index of environment that’s are embedded. The wavelength corresponding to maximum extinction shifts to longer wavelengths as the size of the nanoparticle is increased. The influence of higher-order multipoles is evident for large nanospheres, making the spectra more complex. When the shell thickness of a core/shell particle is decreased, the plasmon resonance shifts to longer wavelengths. This red shift is accompanied by an increase in peak intensity.

Mie Theory; Nanospheres; Optical Properties; Platinum; Silica

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