Ligand-dependent Ag₂S formation: changes in deposition of silver nanoparticles with sulfidation

Abstract

The formation of silver sulfide on the surface of silver nanoparticles is ligand-dependent and is essential for their persistence after sulfidation.

Sulfidation of Ag and ZnO Nanomaterials Significantly Affects Protein Corona Composition: Implications for Human Exposure to Environmentally Aged Nanomaterials

“…These changes in the surface properties tend to enhance particle stability. − However, the increased hydrodynamic light scattering suggested particle growth (SI Figure S3E–H) and/or aggregation (Figure L and SI Figure S4D–F) induced by sulfidation of Ag and ZnO NMs. The potential occurrence of particle aggregation was possibly due to the removal of the surface coatings (e.g., PVP) during sulfidation that diminished the coating-induced steric effect …”

“…Upon sulfidation, both Ag and ZnO NMs became more negatively charged (Figure 1K due to the removal of the surface coatings (e.g., PVP) during sulfidation that diminished the coating-induced steric effect. 51 Sulfidation-Induced Changes in Hard Protein Corona of Ag and ZnO NMs Formed in Human Body Fluids. The protein composition of hard corona appeared to be substantially affected by sulfidation of Ag and ZnO NMs in all tested scenarios of human exposure to nanomaterials, including ingestion, dermal contact and inhalation (Figures 2 and 3, SI Figures S5 and S6, and SI Tables S1−S4).…”

Dynamic Intermolecular Interactions Control Adsorption from Mixtures of Natural Organic Matter and Protein onto Titanium Dioxide Nanoparticles

“…Corona composition, structure, and thickness are also likely to change the reactivity of NPs, including photoreactive TiO 2 NPs, − where the adsorbed macromolecules will interact with both organic pollutants and reactive oxygen species. Finally, the degradation of the corona and transformation of the NP itself can also vary with corona composition, leading to longer-term differences in NP fate and transport. − The thoroughly characterized system presented here will be useful to investigate the effect of the composition and structure of NOM/protein coronas on the photoreactivity of TiO 2 NPs and reactive transformations of the corona.…”

Metal/semiconductor interfaces in nanoscale objects: synthesis, emerging properties and applications of hybrid nanostructures

“…16%-this different low yield suggests that the phase-segregation mechanism is the major reaction path. 146 Silver is especially popular as the metal transformed into Ag 2 S. 147,148 Han and co-workers, for example, formed various M-Ag metallic heterodimers (where M ¼ Pd, Au, Pt). In a subsequent step, in the presence of PVP (polyvinylpyrrolidone) and Na 2 S the silver was suldized, resulting in a M-SC heterodimer.…”