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Updated: Nov 22, 2025

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles

Published on: May 8, 2015

Auxetic Two-Dimensional Nanostructures from DNA*.

Ruixin Li¹, Haorong Chen¹, Jong Hyun Choi¹

¹School of Mechanical Engineering, Purdue University, West Lafayette, IN, 47907, USA.

Angewandte Chemie (International Ed. in English)

|January 6, 2021

Summary

This summary is machine-generated.

Researchers created 2D auxetic nanostructures using DNA origami, bridging a gap in metamaterial design. These novel DNA metamaterials exhibit tunable auxetic properties, influenced by both geometry and material characteristics.

Keywords:

DNA origami auxetic architectures mechanics metamaterials negative Poisson's ratio

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Area of Science:

Materials Science
Nanotechnology
Biomolecular Engineering

Background:

Architectured materials, including metamaterials, display negative Poisson's ratios and improved mechanical properties.
Current auxetic metamaterials are typically macroscopic and fabricated using top-down methods, with a gap in designability from nanometers to microns.
Existing molecular auxetics, such as natural crystals, lack design flexibility.

Purpose of the Study:

To demonstrate two-dimensional auxetic nanostructures using DNA origami.
To explore the design principles for creating auxetic behavior at the nanoscale.
To bridge the gap between molecular auxetics and macroscopic metamaterials using biomolecular self-assembly.

Main Methods:

Fabrication of two-dimensional auxetic nanostructures via DNA origami.
Structural reconfigurations achieved through two-step DNA reactions.
Mechanical deformation analysis using molecular dynamics simulations.

Main Results:

Successful creation of auxetic nanostructures with tunable negative Poisson's ratios.
Demonstration that auxetic behavior is primarily governed by geometrical design.
Identification of the significant role played by material properties in auxetic performance.
Validation of DNA origami as a platform for designing nanoscale auxetic metamaterials.

Conclusions:

DNA origami enables the design and fabrication of novel auxetic nanostructures.
Geometric design is a key factor in achieving auxetic properties in DNA metamaterials.
Material properties also influence the auxetic behavior, offering further design control.
Established design principles for future development of auxetic DNA metamaterials.