title: Reconfigurable Three-Dimensional Gold Nanorod Plasmonic Nanostructures Organized on DNA Origami Tripod.
abstract: 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.
authors.affiliation: CAS Key Laboratory of Nanosystems and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Zhan
authors.affiliation: Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30322, United States.
authors.forename: Palash K
authors.initials: PK
authors.lastname: Dutta
authors.affiliation: Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30322, United States.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Wang
authors.affiliation: Institute of Applied Physics and Computational Mathematics , Beijing 100088, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Song
authors.affiliation: Wyss Institute for Biologically Inspired Engineering, Harvard University , Boston, Massachusetts 02115, United States.
authors.forename: Mingjie
authors.initials: M
authors.lastname: Dai
authors.affiliation: Institute of Applied Physics and Computational Mathematics , Beijing 100088, China.
authors.forename: Shu-Xia
authors.initials: SX
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory of Nanosystems and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Zhen-Gang
authors.initials: ZG
authors.lastname: Wang
authors.affiliation: Wyss Institute for Biologically Inspired Engineering, Harvard University , Boston, Massachusetts 02115, United States.|Department of Systems Biology, Harvard Medical School , Boston, Massachusetts 02115, United States.
authors.forename: Peng
authors.initials: P
authors.lastname: Yin
authors.affiliation: Institute of Applied Physics and Computational Mathematics , Beijing 100088, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: CAS Key Laboratory of Nanosystems and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, China.|University of Chinese Academy of Sciences , Beijing 100049, China.
authors.forename: Baoquan
authors.initials: B
authors.lastname: Ding
authors.affiliation: Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30322, United States.
authors.forename: Yonggang
authors.identifier: 0000-0003-1673-2153
authors.initials: Y
authors.lastname: Ke
mesh_terms: D004247:DNA / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties
chemical_list: D006046:Gold; D004247:DNA; D012825:Silicon
keywords: DNA nanotechnology; DNA origami; dark-field scattering spectroscopy; gold nanorod; plasmonic nanostructure