Preparation of functional hybrid palladium nanoparticles using supercritical fluids: a novel approach to detach the growth and functionalization steps.

We report a novel and versatile approach to control separately the growth and functionalization steps in preparing functional nanomaterials. The applicability of this method was demonstrated with the preparation of palladium nanoparticles capped with thiol or stabilized with ionic liquid.

General approach for the synthesis of organic-inorganic hybrid nanoparticles mediated by supercritical CO2.

We report in this paper novel chemistry that addresses the problem of surfactant solubility in supercritical CO2 for metal nanoparticle synthesis. This new approach for the preparation of organic-functionalized inorganic nanoparticles relies on the reduction of a metal precursor in a CO2-containing insoluble polymer. Reduction of the metal with H2 leads to small nanocrystals stabilized by the polymer with a relatively small polydispersity.