Breitbandige Plasmonische Nanokomposite zur Lichtabsorption, Herstellungsverfahren und Anwendungen

Details

Veröffentlichungs-Nr.

EP4778627

Anmeldetag

30. Oktober 2025

Veröffentlichung

22. Juli 2026

Rechtsraum

EP

Abstract

This invention discloses of a radically new nanomaterial and fabrication method for the excellent removal of pathogenic microbes (viruses, bacteria, fungi) from the nonbiological external surfaces (like glass or traditional wall materials of nonmedical and medical living spaces such as private residence, schools, crowded enclosed rooms or medical settings such as operating rooms, and medical instruments, equipment and other nonbiological surfaces that need proper antimicrobial protection), and for the enhanced photocatalytic removal of organic pollutant from water and/or enhanced water split reactions for hydrogen generation. This high efficiency is demonstrated by (i) exploiting the local plasmonic heating (photothermal) effect and the enhanced photocatalytic effect of the plasmonic noble metal (core) (Au, Ag)-semiconducting metal oxides (ZnO, TiO₂, SnO₂, CeO₂ or any other metal oxide) (shell) binary nanocomposites, which are exposed to the light spectrum, from ultraviolet up to visible and near infrared range, and, (ii) by eliminating the well-known limitations of narrowband light absorption features specific to the plasmonic nanohybrids. As a results of these effects, harvesting as much as possible of the entire solar light spectrum and enhanced generation of reactive oxygen species (ROS) is obtained. In addition, for antimicrobial applications, direct reaction of cations released by the metal oxides with the pathogenic cells in the presence or absence of light may contribute to these benefic effects. These enhanced synergetic effects will kill the pathogenic microbes due to either temperature increase above their supportability level, and/or due to the generation of reactive oxygen species (ROS) which will react with the microbe cell membrane and the inner cell components, for destroying it. The exemplary embodiments related to the original synthesis and use of the novel plasmonic core-shell wideband nanocomposites which are here obtained by mixing of the Au@ZnO, Au@TiO₂, Au@SnO₂, Au@CeO₂, Ag@ZnO, Ag@TiO₂, Ag@SnO₂ and Ag@CeO₂ core-shell plasmonic groups of certain shapes and sizes will change the plasmonic paradigm from "tuning the narrowband absorption of the plasmonic nanocomposite to a certain incident light spectrum " to "a wideband personalized absorption of the incident light of the plasmonic nanocomposite harvesting the light spectrum from ultraviolet to visible and near infrared", which is also present in the harvested sunlight.

Anmelder

Firma

Universitatea Nationala de Stiinta si Tehnologie Politehnica Bucuresti

Land

🇷🇴 Rumänien