DNA-based self-assembly of chiral plasmonic nanostructures with tailored optical response

等离子体子 DNA折纸 材料科学 纳米结构 纳米技术 光电子学 纳米颗粒 纳米尺度 平版印刷术 纳米 DNA纳米技术 自组装 表面等离子共振 DNA 制作 等离子纳米粒子 化学 生物化学 医学 替代医学 病理 复合材料
作者
Anton Kuzyk,Robert Schreiber,Zhiyuan Fan,Günther Pardatscher,Eva-Maria Roller,Alexander Högele,Friedrich C. Simmel,Alexander O. Govorov,Tim Liedl
出处
期刊:Nature [Nature Portfolio]
卷期号:483 (7389): 311-314 被引量:2024
标识
DOI:10.1038/nature10889
摘要

Matter structured on a length scale comparable to or smaller than the wavelength of light can exhibit unusual optical properties1. Particularly promising components for such materials are metal nanostructures, where structural alterations provide a straightforward means of tailoring their surface plasmon resonances and hence their interaction with light2,3. But the top-down fabrication of plasmonic materials with controlled optical responses in the visible spectral range remains challenging, because lithographic methods are limited in resolution and in their ability to generate genuinely three-dimensional architectures4,5. Molecular self-assembly6,7 provides an alternative bottom-up fabrication route not restricted by these limitations, and DNA- and peptide-directed assembly have proved to be viable methods for the controlled arrangement of metal nanoparticles in complex and also chiral geometries8,9,10,11,12,13,14. Here we show that DNA origami15,16 enables the high-yield production of plasmonic structures that contain nanoparticles arranged in nanometre-scale helices. We find, in agreement with theoretical predictions17, that the structures in solution exhibit defined circular dichroism and optical rotatory dispersion effects at visible wavelengths that originate from the collective plasmon–plasmon interactions of the nanoparticles positioned with an accuracy better than two nanometres. Circular dichroism effects in the visible part of the spectrum have been achieved by exploiting the chiral morphology of organic molecules and the plasmonic properties of nanoparticles18,19,20, or even without precise control over the spatial configuration of the nanoparticles12,21,22. In contrast, the optical response of our nanoparticle assemblies is rationally designed and tunable in handedness, colour and intensity—in accordance with our theoretical model.
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