Novel Method of Preparation of Gold‐Nanoparticle‐Doped TiO2 and SiO2 Plasmonic Thin Films: Optical Characterization and Comparison with Maxwell–Garnett Modeling

摘要: SiO2 and TiO2 thin films with gold nanoparticles (NPs) are of particular interest as photovoltaic materials. A novel method for the preparation spin-coated SiO2–Au TiO2–Au nanocomposites is presented. This fast inexpensive method, which includes three separate stages, based on in situ synthesis both metal-oxide matrix Au NPs during a baking process at relatively low temperature. It allows formation nanocomposite higher concentration than other methods. High-resolution transmission electron microscopy studies revealed homogeneous distribution over film volume along their narrow size distribution. The optical manifestation localized surface plasmon resonance was studied more detail TiO2-based Au-doped deposited glass (in absorption transmittance) silicon specular reflectance). Maxwell–Garnett effective-medium theory applied to such metal-doped describes peculiarities experimental spectra, including modification antireflective properties bare by varying metal NPs. capabilities increased after wet etching process.