3 years ago

Programmable Supra-Assembly of a DNA Surface Adapter for Tunable Chiral Directional Self-Assembly of Gold Nanorods

Programmable Supra-Assembly of a DNA Surface Adapter for Tunable Chiral Directional Self-Assembly of Gold Nanorods
Yan Liu, Zhaoming Su, Yadong Zhou, Yonggang Ke, Travis Meyer, Hao Yan, Qiangbin Wang, Shengli Zou, Wah Chiu, Na Liu, Xiang Lan
An important challenge in molecular assembly and hierarchical molecular engineering is to control and program the directional self-assembly into chiral structures. Here, we present a versatile DNA surface adapter that can programmably self-assemble into various chiral supramolecular architectures, thereby regulating the chiral directional “bonding” of gold nanorods decorated by the surface adapter. Distinct optical chirality relevant to the ensemble conformation is demonstrated from the assembled novel stair-like and coil-like gold nanorod chiral metastructures, which is strongly affected by the spatial arrangement of neighboring nanorod pair. Our strategy provides new avenues for fabrication of tunable optical metamaterials by manipulating the directional self-assembly of nanoparticles using programmable surface adapters. Coding with DNA: DNA adapters can be programmably assembled into chiral supramolecular architectures following the distinct binding modality enabled by the selective interactions between specific binding domains. Gold nanorods site-specifically decorated on the DNA adapters self-assemble into new plasmonic chiral metastructures with facilely tunable configurations and handedness following the DNA chiral supramolecular matrix.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201709775

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