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Chirality in Nature

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Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.

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Related Experiment Video

Updated: Aug 2, 2025

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Origami Inspired Self-assembly of Patterned and Reconfigurable Particles

Published on: February 4, 2013

3D Chiral Micro-Pinwheels Based on Rolling-Up Kirigami Technology.

Kun Wang¹, Chaojian Hou¹, Longqing Cong²

¹Department of Biomedical Engineering, City University of Hong Kong, Hong Kong, 999077, China.

|April 19, 2023

Summary

Researchers developed "rolling-up kirigami," a novel method to create complex 3D microstructures. This technique enables advanced applications like microrobots and sensitive molecule detection.

Keywords:

flabella micro-pinwheels rolling-up kirigami terahertz detection

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Last Updated: Aug 2, 2025

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Published on: September 23, 2018

Area of Science:

Materials Science
Mechanical Engineering
Nanotechnology

Background:

3D micro/nanostructures offer enhanced integration and functionality compared to 2D counterparts.
Fabricating complex 3D microstructures often involves challenging post-processing or additive manufacturing techniques.

Purpose of the Study:

To introduce a novel method for creating 3D micro/nanostructures by combining kirigami and rolling-up techniques.
To demonstrate the fabrication and application of 3D micro-pinwheels using this new approach.

Main Methods:

Patterning micro-pinwheels with multiple flabella on pre-stressed bilayer membranes.
Utilizing a dynamic rolling-up process simulated with elastic mechanics and a movable releasing boundary.
Integrating 3D chiral micro-pinwheel arrays into microfluidic chips for sensing applications.

Main Results:

Successfully fabricated 3D micro-pinwheels exhibiting complex dynamic behaviors during the rolling-up process.
Demonstrated the potential for parallel microrobots and adaptive 3D micro-antennas due to observed translation-rotation conversion.
Achieved successful detection of organic molecules in solution using terahertz apparatus with integrated 3D chiral micro-pinwheel arrays.

Conclusions:

Rolling-up kirigami provides an efficient method for fabricating complex 3D micro/nanostructures from 2D patterns.
The developed 3D micro-pinwheels show promise for applications in microrobotics, adaptive antennas, and sensitive chemical detection.
This technique offers a versatile platform for functionalizing 3D kirigami structures as tunable devices.