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Related Experiment Video

Updated: Jan 24, 2026

Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates

Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates

Published on: March 5, 2019

Magnetic Plasmon Networks Programmed by Molecular Self-Assembly.

Pengfei Wang¹, Ji-Hyeok Huh², Jaewon Lee²

¹Institute of Molecular Medicine (IMM), Renji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, China.

Advanced Materials (Deerfield Beach, Fla.)

|June 1, 2019

Summary

DNA origami enables precise assembly of gold nanoparticles into magnetic nanostructures. This breakthrough allows for the creation of advanced optical magnetic circuitry and metamaterials with tunable properties.

Keywords:

DNA nanotechnology artificial magnetism colloids plasmonics self-assembly

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Area of Science:

Plasmonics
Metamaterials
Nanotechnology
DNA nanotechnology

Background:

Nanoscale magnetic field manipulation is crucial for advanced optical properties in plasmonics and metamaterials.
Cyclic clusters of plasmonic nanoparticles (NPs) show potential for induced magnetism, inspired by natural molecular magnetism.
Assembling NPs into complex networks for strong visible magnetism remains a significant challenge.

Purpose of the Study:

To introduce a DNA-origami-based strategy for molecular self-assembly of NPs into complex magnetic architectures.
To achieve emergent magnetic properties in plasmonic nanostructures.
To develop a tunable and scalable method for creating optical magnetic circuitry and metamaterials.

Main Methods:

Utilizing DNA origami for precise arrangement of gold NPs (AuNPs) into a six-AuNP ring building block.
Hierarchical self-assembly of AuNP rings into higher-order networks, clusters, and polymeric chains.
In situ silver growth on AuNP seeds to induce strong emergent plasmonic properties.

Main Results:

Successful creation of complex magnetic NP architectures via DNA-origami-directed self-assembly.
Observation of emergent properties including anti-ferromagnetism and purely magnetic-based Fano resonances.
Demonstration of magnetic surface plasmon polaritons in the assembled nanostructures.

Conclusions:

The DNA-origami strategy provides a powerful and scalable platform for assembling magnetic plasmonic nanostructures.
This approach facilitates the development of novel optical magnetic circuitry and high-fidelity plasmonic metamaterials.
The emergent magnetic properties open new avenues for applications in nanophotonics and materials science.