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Related Experiment Video

Updated: Oct 17, 2025

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DNA Programmable Self-Assembly of Planar, Thin-Layered Chiral Nanoparticle Superstructures with Complex

Yan Liu1,2, Li Ma1,2,3, Shuoxing Jiang4,5

  • 1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People's Republic of China.

ACS Nano
|October 12, 2021
PubMed
Summary
This summary is machine-generated.

Researchers created chiral plasmonic superstructures using DNA self-assembly of gold nanorods. These 2D materials exhibit giant chiroptical responses, paving the way for advanced chiral metasurfaces and light manipulation.

Keywords:
DNA self-assemblychiral plasmonicsg-factorgold nanorodsthin-layered chiral superstructure

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Area of Science:

  • Plasmonics
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Chiral plasmonic materials are crucial for light manipulation.
  • Existing methods for creating complex chiral nanostructures are limited.
  • DNA nanotechnology offers precise control over nanoparticle assembly.

Purpose of the Study:

  • To develop planar, thin-layered chiral plasmonic superstructures with complex 2D patterns.
  • To investigate the chiroptical properties of these self-assembled nanostructures.
  • To explore their potential applications in chiral light-matter interactions.

Main Methods:

  • Utilizing DNA programmable 2D supramolecular self-assembly of gold nanorods (AuNRs).
  • Designing specific DNA templates to direct the formation of binary star and pinwheel patterns.
  • Characterizing the size, shape, and chiroptical responses of the resulting superstructures.

Main Results:

  • Successfully fabricated planar, thin-layered chiral superstructures (bi-stars, pinwheels) with controlled sizes (~240 nm).
  • Demonstrated giant anisotropy in chiroptical responses.
  • Observed enhanced g-factors under axial excitation compared to in-plane excitation.

Conclusions:

  • DNA programmable self-assembly is an effective strategy for creating complex 2D chiral plasmonic materials.
  • These superstructures exhibit significant chiroptical properties suitable for advanced applications.
  • The findings open avenues for on-chip manipulation of chiral light-matter interactions using engineered nanomaterials.