银纳米结构的制备及其光学性质研究
首发时间:2011-01-20
摘要:低维金属纳米结构因其在电子、光学器件和传感器上的潜在应用而成为近几年来纳米材料研究的热点课题,其中对金属银纳米结构的研究更引起人们广泛的关注。本文以聚乙烯吡咯烷酮(polyvinylpyrrolidone, 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、拉曼(Raman)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。
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Fabrication and Optical Properties of Ag Nanostructures with Various Morphologies
Abstract:In this paper, 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.
Keywords: Ag Nanowires Ag nanoparticles Optical properties
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