Reconfigurable Three-Dimensional Gold Nanorod Plasmonic Nanostructures Organized on DNA Origami Tripod.

Reconfigurable Three-Dimensional Gold Nanorod Plasmonic Nanostructures Organized on DNA Origami Tripod.
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DNA折纸三脚架上组织的可重构三维金纳米棒等离子体纳米结构

DOI:
10.1021/acsnano.6b06861
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发表时间:
2017-02-28
期刊:
影响因子:
17.1
通讯作者:
Ke Y
Ke Y
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhan P;Dutta PK;Wang P;Song G;Dai M;Zhao SX;Wang ZG;Yin P;Zhang W;Ding B;Ke Y

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等离子体纳米结构的三维 (3D) 配置可以产生独特的电磁特性。此外,由物理或化学刺激驱动的动态等离子体纳米结构的重新配置可以产生定制的等离子体响应。在这项工作中,我们利用自下而上的 DNA 自组装构建了具有可控、可逆构象转变的 3D 可重构等离子体纳米结构。将三个金纳米棒 (AuNR) 放置在可重构 DNA 折纸三脚架上。通过通过立足点介导的链位移操作折纸三脚架来精确调整纳米杆内部角度和距离。构象变化的转导表现为等离子体共振峰的受控移动,这通过暗场显微镜进行了研究,并且与电动力学计算非常吻合。这种新的3D等离子体纳米结构不仅提供了一种研究AuNR在指定3D构象下等离子体共振的方法,而且还证明DNA折纸可以作为通用自组装平台,用于构建具有定制光学特性的各种3D可重构等离子体纳米结构。
Distinct electromagnetic properties can emerge from the three-dimensional (3D) configuration of a plasmonic nanostructure. Furthermore, the reconfiguration of a dynamic plasmonic nanostructure, driven by physical or chemical stimuli, may generate a tailored plasmonic response. In this work, we constructed a 3D reconfigurable plasmonic nanostructure with controllable, reversible conformational transformation using bottom-up DNA self-assembly. Three gold nanorods (AuNRs) were positioned onto a reconfigurable DNA origami tripod. The internanorod angle and distance were precisely tuned through operating the origami tripod by toehold-mediated strand displacement. The transduction of conformational change manifested into a controlled shift of the plasmonic resonance peak, which was studied by dark-field microscopy, and agrees well with electrodynamic calculations. This new 3D plasmonic nanostructure not only provides a method to study the plasmonic resonance of AuNRs at prescribed 3D conformations but also demonstrates that DNA origami can serve as a general self-assembly platform for constructing various 3D reconfigurable plasmonic nanostructures with customized optical properties.
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