Characterization of golden vaterite by the extended Maxwell Garnett formalism

TL;DR

This paper models how gold nanoparticles affect the optical properties of vaterite using an advanced homogenization approach that considers anisotropy and nanoparticle characteristics.

Contribution

It introduces an extended Maxwell Garnett formalism that accounts for nanoparticle size, shape, orientation, and vaterite anisotropy in homogenization.

Findings

Permittivity is highly sensitive to nanoparticle parameters.

Size-dependent permittivity influences composite optical properties.

Anisotropy significantly affects homogenized permittivity.

Abstract

The homogenization of vaterite impregnated with gold nanoparticles was accomplished using the extended Maxwell Garnett formalism. The extended formalism takes into account the intrinsic anisotropy of vaterite as well as the size, shape, and orientation of the nanoparticles. Size-dependent permittivity was used for the gold nanoparticles. Numerical studies revealed that the homogenized composite material's permittivity parameters are acutely sensitive to the size, shape, orientation, and volume fraction of the gold nanoparticles.