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Updated: Feb 8, 2026

Assembly of Gold Nanorods into Chiral Plasmonic Metamolecules Using DNA Origami Templates
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Programming DNA origami assembly for shape-resolved nanomechanical imaging labels.

Jie Chao1, Honglu Zhang2, Yikang Xing1

  • 1Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Jiangsu Key Laboratory for Biosensors, School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing, China.

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Summary
This summary is machine-generated.

Researchers developed DNA origami shape IDs for high-resolution atomic force microscopy (AFM) nanomechanical imaging. This method enables precise labeling of genomic DNA, improving single-nucleotide polymorphism (SNP) detection for disease gene analysis.

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Area of Science:

  • Nanotechnology
  • Molecular Biology
  • Biophysics

Background:

  • Atomic force microscopy (AFM) offers high-resolution imaging of biomolecules.
  • Current limitations in nanomechanical labeling hinder broader biological applications of AFM.

Purpose of the Study:

  • To develop novel nanomechanical labels using DNA origami technology.
  • To enable site-specific labeling of genomic DNA for high-throughput applications.
  • To improve the resolution of imaging-based genotyping.

Main Methods:

  • Utilized self-assembled DNA origami to create shape-resolved nanomechanical labels ('origami shape IDs').
  • Designed 'mediator' strands for specific hybridization between origami shapes and target DNA.
  • Applied AFM imaging to visualize labeled DNA sequences, including those with single-nucleotide polymorphisms (SNPs).

Main Results:

  • Achieved site-specific labeling of genomic DNA with high efficiency and throughput.
  • Demonstrated differentiation of adjacent labeling sites separated by as little as 30 nucleobases (~10 nm) using AFM.
  • Showcased threefold resolution improvement compared to super-resolution imaging for genotyping.
  • Successfully applied origami shape IDs for high-resolution genotyping of SNPs in disease-associated genes.

Conclusions:

  • DNA origami shape IDs provide a powerful tool for high-resolution nanomechanical imaging and genomic analysis.
  • This approach overcomes limitations in nanomechanical labeling for AFM applications.
  • The method offers a rapid (~2 days) and effective solution for SNP genotyping in clinical contexts.