Control of Surface Plasmon Localization via Self-Assembly of Silver Nanoparticles along Silver Nanowires
Control of Surface Plasmon Localization via Self-Assembly of Silver Nanoparticles along Silver Nanowires
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DOI：
10.1021/ja807218e
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发表时间：
2008-12-24
影响因子：
15
通讯作者：
Uji-i, Hiroshi
中科院分区：
文献类型：
--
作者：
Tran, M. Linh;Centeno, Silvia P.;Uji-i, Hiroshi
提出了一种简单、低成本的方法来制造具有规则间距的表面等离子体共振热点的金属-金属杂化纳米结构。利用化学合成的银纳米线和单批多元醇法制备的银纳米颗粒，在简单的滴注过程中通过自组装制备了纳米杂化结构。这些纳米杂化材料的宽场照射产生了间距约为500 nm到1微米的热点，热点的发射/散射强度随着时间的推移而波动。所提出的结构可用于开发分子传感器或作为表面增强拉曼/荧光光谱的衬底。
A simple and low-cost method to create metal-metal hybrid nanostructures possessing fairly regularly spaced "hot-spots" of surface plasmon resonances is proposed. The nanohybrid structure was prepared via self-assembly during a simple drop-casting procedure, using chemically synthesized silver nanowires and silver nanoparticles prepared in a single batch of a polyol process. Wide field illumination of these nanohybrids produced hot-spots with spacings of around 500 nm to 1 mu m. The intensity of the emission/scattering from the hot-spots fluctuates over time. The proposed structure can be useful for the development of molecular-sensors or as a substrate for surface enhanced Raman/fluorescence spectroscopy.