DNA-enabled self-assembly of plasmonic nanoclusters.

DNA-enabled self-assembly of plasmonic nanoclusters.
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DOI:
10.1021/nl203194m
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发表时间:
2011-11-09
期刊:
影响因子:
10.8
通讯作者:
Capasso F
Capasso F
中科院分区:
材料科学1区
文献类型:
--
作者:
Fan JA;He Y;Bao K;Wu C;Bao J;Schade NB;Manoharan VN;Shvets G;Nordlander P;Liu DR;Capasso F

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DNA纳米技术为纳米结构的化学组装提供了一个通用的基础。等离子体纳米粒子组件是特别感兴趣的,因为它们可以被定制以表现出广泛的电磁现象。在这封信中,我们报告了DNA功能化的纳米粒子组装成五聚体簇,它由一个较小的金球由四个较大的球环包围。在单个簇中观察到磁共振和类Fano共振。DNA起着双重作用:它在溶液中选择性地组装团簇,并用作导电纳米颗粒之间的绝缘间隔物。这些粒子组装体可以推广到一类新的DNA使能的等离子体异质结构,其包括各种活性和无源材料以及其他形式的DNA支架。
DNA nanotechnology provides a versatile foundation for the chemical assembly of nanostructures. Plasmonic nanoparticle assemblies are of particular interest because they can be tailored to exhibit a broad range of electromagnetic phenomena. In this Letter, we report the assembly of DNA-functionalized nanoparticles into pentamer clusters, which consist of a smaller gold sphere surrounded by a ring of four larger spheres. Magnetic and Fano-like resonances are observed in individual clusters. The DNA plays a dual role: it selectively assembles the clusters in solution and functions as an insulating spacer between the conductive nanoparticles. These particle assemblies can be generalized to a new class of DNA-enabled plasmonic heterostructures that comprise various active and passive materials and other forms of DNA scaffolding.
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