In the study of Liu et al. the aim was to investigate the kinetics of silver ion release from nanoparticles. As stated by the authors, silver ions are released during a cooperative oxidation process, during which both dissolved oxygen and protons are required.

2010年10月22日 · After presenting thermodynamic calculations of silver species partitioning in biological media, the rates of oxidative silver dissolution are measured for nanoparticles and macroscopic foils and used to derive unified area-based release kinetics.

In addition, the dissolution of silver nanoparticles releases antimicrobial silver ions, which can interact with thiol-containing proteins in the cell wall and influence their functions. When interacting with the outer membrane, silver nanoparticles can bind to proteins, forming complexes with electronic donors containing oxygen, phosphorus ...

2013年6月5日 · Nanosilver, due to its small particle size and enormous specific surface area, facilitates more rapid dissolution of ions than the equivalent bulk material; potentially leading to increased toxicity of nanosilver.

2020年4月15日 · Our study provided a new evidence that hydrogel could reduce the release of silver ions from AgNPs, thereby reducing the damage caused by silver ions. The phenomenon of silver ions released continuously at low level suggests the excellent biocompatibility of the AgNPs-loaded hydrogel.

2021年3月1日 · A study demonstrated that the biochar can break the PHBV (polyhydroxybutyrate-co-valerate) composites containing Ag NPs to release silver ions and eventually adsorb in a tropical soil environment (Gonçalves et al., 2018). Therefore, biochar adsorption should be tested for other silver forms that are available in aqueous solutions.

The release of silver ions (Ag +) is an important process in determining the environmental fate and toxic effects of silver nanoparticles (AgNPs), but the released Ag + can be reduced to form new AgNPs in environments.

2 天之前 · A green synthesis method has been used in the present study for the synthesis of silver nanoparticles (AgNPs). The non-toxic ethanolic and aqueous extract from the stem of Asparagus officinalis (AO) has been used as a reducing and stabilizing agent. The presence of biosynthesized AgNPs in the reaction mixture was visually validated by a color change and eventually determined by UV-Visible ...

1 天前 · The biosynthesis of silver nanoparticles using the supernatant of the bacterium Actinomyces spp. demonstrates the biological reduction of silver ions to form stable nanoparticles, a process that can be visually observed through a …

2 天之前 · Size, size distribution and dispersibility are key parameters for silver nanoparticles (AgNPs), however, these properties are very difficult to control and to set precisely, especially in sustainable products and in a green and economical way. This study developed a facile, efficient, green and economical one-pot strategy to prepare AgNPs in a highly reproducible way with extremely small size ...