Role of stabilizing agents in the formation of stable silver nanoparticles in aqueous solution: Characterization and stability study

The stability of silver nanoparticles is controlled mainly by two major factors, namely, aggregation and oxidation. In the present study, silver nanoparticles were synthesized by using different series of reducing agents like a strong reducing agent (sodium borohydride), a mild reducing agent (tri-sodium citrate), and a weak reducing agent (glucose) with different capping agents, namely, polyvinyl pyrrolidone (PVP K 30), starch, and sodium carboxyl methyl cellulose (NaCMC). The synthesized silver nanoparticles were characterized by UV-Visible absorption spectroscopy, dynamic light scattering (DLS), atomic force microscopy (AFM), and anti-microbial activity. The particle size of silver nanoparticles varies in the following order: sodium borohydride

银纳米颗粒（silver nanoparticles）的稳定性主要受控于两大核心因素，即聚集与氧化。本研究中，研究人员采用不同系列的还原剂并搭配不同包覆剂合成银纳米颗粒：还原剂包括强还原剂硼氢化钠（sodium borohydride）、温和还原剂柠檬酸三钠（tri-sodium citrate）以及弱还原剂葡萄糖（glucose）；包覆剂则为聚乙烯吡咯烷酮（polyvinyl pyrrolidone，PVP K 30）、淀粉与羧甲基纤维素钠（sodium carboxyl methyl cellulose，NaCMC）。所合成的银纳米颗粒通过紫外-可见吸收光谱、动态光散射（dynamic light scattering，DLS）、原子力显微镜（atomic force microscopy，AFM）以及抗菌活性进行表征。银纳米颗粒的粒径遵循如下排序：硼氢化钠（sodium borohydride）