Plasma-Assisted and Solvent-Free Ultra-Fast Synthesis of Gold and Gold Oxide Ultra-Small Nanoparticles and its use as Multi-Sensing Platforms.

ABSTRACT: In this work, a plasma-assisted and solvent-free synthesis of gold (Au) and gold oxide (Au₂O₃) nanoparticles (NPs) is explored. Accordingly, only the precursor (i.e., HAuCl₄ powder) is exposed to the N₂:O₂ plasma gas mixtures, selected to promote its reduction to Au (HAuCl₄-to-Au⁰) and/or favor its further oxidation to Au₂O₃. As a result, the production of highly crystalline spherical Au ultra-small NPs (USNPs) of 2.7 ± 0.7 nm and Au₂O₃ edged pyramidal-like NPs of 18 ± 5 nm is obtained in very short times (i.e., 10 s^-1 min), showing excellent stability without the need to add any ligands. To investigate the potential features of the synthesized particles, they

SUBMITTER: Sans J 

PROVIDER: S-EPMC12696787 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature