Applicability of T-matrix light scattering simulations for the spectral investigation of sintered nanoparticles

In this paper we investigate the applicability of T-matrix light scattering calculations to determine the spectral behaviour of metallic nanoparticles during a sintering process. We are especially interested in spectral changes and plasmonic effects during the process of approaching and sintering as this might help to establish a measurement method for the degree of sintering. For this, we consider two separate spherical nanoparticles which get closer and closer until they touch; then the sintering process starts, resulting in a single particle. This resulting shape of the single particle is described by a Cassini-oval. As materials we choose silver (Ag), gold (Au), titanium nitride (TiN) and indium tin oxide (ITO). The calculations are done using the Nullfield Method with Discrete Sources.

► T-matrix light scattering calculation applied to spectral analysis of sintered particles. ► Different stages of the sintering process were investigated. ► Orientation averaged scattering was calculated. ► Effects caused by particle materials and geometries can be distinguished.