DNA折纸
化学
纳米技术
纳米结构
手性(物理)
表面等离子共振
等离子体子
成核
金属
DNA缩合
制作
化学物理
材料科学
光电子学
纳米颗粒
有机化学
物理
夸克
基因
替代医学
Nambu–Jona Lasinio模型
手征对称破缺
病理
转染
生物化学
量子力学
医学
作者
Yinan Zhang,Zhibei Qu,Jiang Chu,Yingying Liu,Raghu Pradeep Narayanan,Dewight Williams,Xiaolei Zuo,Lihua Wang,Hao Yan,Huajie Liu,Chunhai Fan
摘要
Metal nanostructures of chiral geometry interacting with light via surface plasmon resonances can produce tailorable optical activity with their structural alterations. However, bottom-up fabrication of arbitrary chiral metal nanostructures with precise size and morphology remains a synthetic challenge. Here we develop a DNA origami-enabled aqueous solution metallization strategy to prescribe the chirality of silver nanostructures in three dimensions. We find that diamine silver(I) complexes coordinate with the bases of prescribed single-stranded protruding clustered DNA (pcDNA) on DNA origami via synergetic interactions including coordination, hydrogen bonds, and ion-π interaction, which induce site-specific pcDNA condensation and local enrichment of silver precursors that lowers the activation energy for nucleation. Using tubular DNA origami-based metallization, we obtain helical silver patterns up to a micrometer in length with well-defined chirality and pitches. We further demonstrate tailorable plasmonic optical activity of metallized chiral silver nanostructures. This method opens new pathways to synthesize programmable inorganic materials with arbitrary morphology and chirality.
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