Self-Organized Silver Nanoparticles for Three-Dimensional Plasmonic Crystals
Self-Organized Silver Nanoparticles for Three-Dimensional Plasmonic Crystals
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DOI：
10.1021/nl802877h
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发表时间：
2008-11-01
期刊：
影响因子：
10.8
通讯作者：
Yang, Peidong
中科院分区：
文献类型：
--
作者：
Tao, Andrea R.;Ceperley, Daniel P.;Yang, Peidong
支持表面等离子体的金属纳米结构作为等离子体电路元件和超材料的构建块是引人注目的。我们在这里展示了形状的银纳米粒子自发地自组装成三维等离子体晶体，在可见波长上显示出频率选择性响应。由特殊的胶体单分散性介导的广泛的长程有序导致了可以通过颗粒体积分数来调节的光学通带。这些金属超晶体为等离子体材料的制造提供了一种新的范例，提供了一种功能性的、可调的、完全自下而上的光学元件，无需光刻就可以在大规模平行的规模上构建。
Metal nanostructures that Support surface plasmons are compelling as plasmonic circuit elements and as the building blocks for metamaterials. We demonstrate here the spontaneous self-assembly of shaped silver nanoparticles into three-dimensional plasmonic crystals that display a frequency-selective response in the visible wavelengths. Extensive long-range order mediated by exceptional colloid monodispersity gives rise to optical passbands that can be tuned by particle volume fraction. These metallic supercrystals present a new paradigm for the fabrication of plasmonic materials, delivering a functional, tunable, completely bottom-up optical element that can be constructed on a massively parallel scale without lithography.