One-pot one-step synthesis of Au@SiO₂ core–shell nanoparticles and their shell-thickness-dependent fluorescent properties

Abstract

Au@SiO2 core–shell nanoparticles with tunable Au core size and silica shell thickness were prepared by a facile one-pot one-step method.

One-pot synthesis of Au-M@SiO2 (M = Rh, Pd, Ir, Pt) core–shell nanoparticles as highly efficient catalysts for the reduction of 4-nitrophenol

“…The formation mechanism of Au-Rh@SiO 2 core–shell NPs was investigated by acquiring TEM images of the samples taken at different reaction times. Here, Au-Rh@SiO 2 core–shell NPs were synthesized by a one-pot one-step method developed by our research group and Zhao’s group 46 , 47 . HAuCl 4 and RhCl 3 were reduced by formaldehyde to result in the formation of Au-Rh core-satellite NPs after the reacted solution was heated at 80 °C for 5 min.…”

“…Au@SiO 2 core–shell NPs were synthesized by a facile one-pot one-step method using formaldehyde as a reducing agent 46 , 47 . Similarly, M@SiO 2 (M = Rh, Pd, Ir and Pt) core–shell NPs were prepared by changing the corresponding metal precursors.…”

One-pot synthesis of Au-M@SiO2 (M = Rh, Pd, Ir, Pt) core-shell nanoparticles as highly efficient catalysts for the reduction of 4-nitrophenol

“…The formation mechanism of Au-Rh@SiO 2 core-shell NPs was investigated by acquiring TEM images of the samples taken at different reaction times. Here, Au-Rh@SiO 2 core-shell NPs were synthesized by a one-pot one-step method developed by our research group and Zhao's group 42,43 . HAuCl 4 and RhCl 3 were reduced by formaldehyde to result in the formation of Au-Rh core-satellite NPs after the reacted solution was heated at 80°C for 5 min.…”

“…Chloroauric acid tetrahydrate (HAuCl Synthesis. Au@SiO 2 core-shell NPs were synthesized by a facile one-pot one-step method using formaldehyde as a reducing agent 42,43 . Similarly, M@SiO 2 (M = Rh, Pd, Ir and Pt) core-shell NPs were prepared by changing the corresponding metal precursors.…”

Characterization and Cytotoxicity Comparison of Silver- and Silica-Based Nanostructures

“…The type of obtained nanostructures that are composed of two materials are called core-shell nanostructures and can be divided into various categories according to their physicochemical properties-for example, core-shell nanoparticles, core-shell magnetics, core-shell silica nanoparticles, or core-shell polymer nanoparticles [15]. Taking into account recent scientific reports, the interest of scientists is focused primarily on silica-covered metal Materials 2021, 14, 4987 2 of 16 structures, the most frequently studied of which are Ag@SiO 2 [8,16,17], Au@SiO 2 [18][19][20], or TiO 2 @SiO 2 [21][22][23]. It is worth mentioning that core-shell nanomaterials are not only less cytotoxic but also show high dispersibility, biocompatibility, and improved thermal and chemical stability [7].…”