title: Bifacial DNA origami-directed discrete, three-dimensional, anisotropic plasmonic nanoarchitectures with tailored optical chirality.
abstract: Discrete three-dimensional (3D) plasmonic nanoarchitectures with well-defined spatial configuration and geometry have aroused increasing interest, as new optical properties may originate from plasmon resonance coupling within the nanoarchitectures. Although spherical building blocks have been successfully employed in constructing 3D plasmonic nanoarchitectures because their isotropic nature facilitates unoriented localization, it still remains challenging to assemble anisotropic building blocks into discrete and rationally tailored 3D plasmonic nanoarchitectures. Here we report the first example of discrete 3D anisotropic gold nanorod (AuNR) dimer nanoarchitectures formed using bifacial DNA origami as a template, in which the 3D spatial configuration is precisely tuned by rationally shifting the location of AuNRs on the origami template. A distinct plasmonic chiral response was experimentally observed from the discrete 3D AuNR dimer nanoarchitectures and appeared in a spatial-configuration-dependent manner. This study represents great progress in the fabrication of 3D plasmonic nanoarchitectures with tailored optical chirality.
authors.affiliation: Suzhou Key Laboratory of Nanobiomedical Characterization, Division of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Lan
authors.forename: Zhong
authors.initials: Z
authors.lastname: Chen
authors.forename: Gaole
authors.initials: G
authors.lastname: Dai
authors.forename: Xuxing
authors.initials: X
authors.lastname: Lu
authors.forename: Weihai
authors.initials: W
authors.lastname: Ni
authors.forename: Qiangbin
authors.initials: Q
authors.lastname: Wang
mesh_terms: D016880:Anisotropy; D002942:Circular Dichroism; D004247:DNA / Q000737:chemistry*; D019281:Dimerization; D006046:Gold / Q000737:chemistry*; D036103:Nanotechnology; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D006046:Gold; D004247:DNA