【摘要】 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。更多还原

【Abstract】 The well-known ethylene glycol reduction method with polyvinylpyrrolidone (PVP) as surfactant was used to prepare Ag nanostructures with various morphologies. The structure and optical properties of the as-prepared Ag nanostructures were investigated in detail; and the waveguiding properties of a single Ag nanowire were studied experimentally and theoretically. The results indicate that Ag nanowires are an effective waveguiding cavity, and the light can propagate through the nanowire from one end to another end with the assistance of surface plasmon resonance.更多还原