Abstract In this study, a surfactant-assisted method was employed to successfully prepare plasmonic nanoparticle assemblies encapsulated in hollow silica particles. In this method, silica was precipitated in the presence of plasmonic nanoparticles with single nanometer sizes and an anionic surfactant, sodium oleate (NaOA). The absorption peak of the composite particles was red-shifted compared with that for the well-dispersed suspension of the plasmonic nanoparticles. The extent of red-shift was easily tuned by changing the concentration of nanoparticles incorporated in the hollow silica particles. A binary-nanoparticle assembly, comprising gold and silver nanoparticles, was also prepared. Hence, this method can be extended to the design of novel multifunctional particles based on different nanoparticle assemblies.

中文翻译：

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使用表面活性剂辅助方法在中空二氧化硅颗粒内形成一元或二元等离子体纳米颗粒组件

摘要 在本研究中，采用表面活性剂辅助的方法成功制备了包裹在中空二氧化硅颗粒中的等离子体纳米颗粒组件。在该方法中，二氧化硅在具有单纳米尺寸的等离子体纳米粒子和阴离子表面活性剂油酸钠 (NaOA) 的存在下沉淀。与等离子体纳米粒子分散良好的悬浮液相比，复合粒子的吸收峰发生红移。通过改变掺入中空二氧化硅颗粒中的纳米颗粒的浓度，很容易调节红移的程度。还制备了包含金和银纳米颗粒的二元纳米颗粒组件。因此，该方法可以扩展到基于不同纳米粒子组件的新型多功能粒子的设计。