The production of cheap and effective compound for medicinal application is a major challenge for scientific community. So, several biological materials have been explored for the possible application in material synthesis which are useful in biomedical uses. Here, biomolecules from green tea leaves were functionalized on the surface of silicon dioxide nanoparticles (GSiO₂ NPs). Next, the decoration silver (Ag) NPs on the surface of the GSiO₂ NPs was observed in very short time of incubation in aqueous AgNO₃. Ultraviolet–visible spectroscopy confirmed the formation of Ag NPs and the high-resolution transmission and scanning electron microscopies confirmed the decoration of spherical Ag NPs of 10 to 15 nm size on the surface of GSiO₂ NPs. The antimicrobial activity of the Ag–GSiO₂ NPs was determined against Staphylococcus aureus and Escherichia coli. The Ag–GSiO₂ NPs displayed sustainable antimicrobial activity compared to Ag ions. The results indicate the potential value of Ag–GSiO₂ NPs in surgical material and food processing.

中文翻译：

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生物合成的银纳米粒子装饰的二氧化硅纳米粒子的抗菌活性。

生产廉价，有效的药用化合物是科学界面临的主要挑战。因此，已经探索了几种生物材料在材料合成中的可能应用，这些材料可用于生物医学用途。在这里，来自绿茶叶的生物分子在二氧化硅纳米颗粒（GSiO ₂ NPs）的表面上被官能化。接下来，在非常短的时间在AgNO ₃水溶液中孵育的时间内，观察到了GSiO ₂ NPs表面上的装饰性银（Ag）NPs 。紫外可见光谱证实了Ag NP的形成，高分辨率透射和扫描电子显微镜检查证实了在GSiO ₂表面上装饰了10至15 nm尺寸的球形Ag NPsNP。测定了Ag-GSiO ₂ NPs对金黄色葡萄球菌和大肠杆菌的抗菌活性。与Ag离子相比，Ag -GSiO ₂ NPs具有可持续的抗菌活性。结果表明，Ag-GSiO ₂ NPs在外科材料和食品加工中具有潜在价值。