Facile deposition and plasmonic resonance of Ag–Au nanoparticles in titania thin film

Abstract

Plasmon resonance in noble metals at the nanoscale is technologically important for various applications as it is an important fundamental building block of plasmonic devices. Silver embedded in a glass matrix followed by the deposition of gold embedded in a titania matrix were synthesized in three to four steps by a simple and inexpensive thermal spray pyrolysis technique. The effects of annealing temperature on the plasmonic response and optical activity of silver and gold nanoclusters in soda-lime glass and titanium dioxide matrices have been investigated using UV-visible absorption spectroscopy and photoluminescence spectroscopy. The surface plasmon resonance (SPR) at a hybrid metal-dielectric interface for silver and gold was shown to be influenced by the presence of Ag + ions and the increased particle size of gold nanoparticles as a function of post annealing temperature. This study reveals that the SPR and the luminescence properties are strongly dependent on the glass matrix, which cannot be achieved in all types of glass slides.Field emission scanning electron micrographs confirming the presence of randomly shaped nanoparticles whose size increases with annealing temperature were inconsistent with the particle size calculated from Mie theory.

Photodegradation of organic dyes based on anatase and rutile TiO2nanoparticles

“…Light emitting properties in nano-titania may arise due to presence of surface plasmons (presence of Ti-OH). 29 The emission band in the present case was observed at about 385 nm ($3.23 eV). Fig.…”

Metallized polyimide films for biomedical applications: X‐ray photoelectron spectroscopy, surface tension, and blood compatibility studies

“…This is assigned to gold in the metallic state (Au 0 ). [65] The absence of XPS signals which can be attributed to both PI substrates confirm the obtaining of one uniform metal layer for both material systems. The semi-aromatic PI enables a higher amount of gold deposition on its surface as a result of its twisted structure.…”

An optical absorption of the composite with the nanoparticles, which are covered by the surfactant layer

“…Metallic nanoparticles play the significant role in electronic, optoelectronic, thermal and biomedical applications and, precisely for this reason, they attract an attention of the researchers for a long time (see, e.g., [1,2] and references therein). The new trend in optics of metallic nanostructuresnanoplasmonics has appeared due to this fact.…”