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以聚乙烯吡咯烷酮(PVP)作为表面活性剂,利用乙二醇还原体系合成了具有不同形貌的银纳米结构,并详细分析了这些银纳米结构的形貌和结构特征。通过紫外-可见吸收光谱检测分析了不同形貌银纳米结构的光学性质;并从实验和理论上详细研究了单根银纳米线的光波导特征。实验表明,单根Ag纳米线是非常有效的波导腔,入射光可通过存在于Ag纳米线表面的表面等离激元辅助在纳米尺度上有效地输运到纳米线最末端而再发射。
Polyvinylpyrrolidone (PVP) was used as surfactant to synthesize silver nanostructures with different morphologies by ethylene glycol reduction system. The morphology and structure of these silver nanostructures were analyzed in detail. The optical properties of silver nanostructures with different morphologies were analyzed by ultraviolet-visible absorption spectroscopy. The optical waveguide characteristics of single silver nanowires were studied experimentally and theoretically. Experiments show that a single Ag nanowire is a very effective waveguide cavity. The incident light can be efficiently transported to the end of the nanowire for emission by the surface plasmon which is present on the surface of the Ag nanowire.