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Chirality

Chirality

Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...

Chirality in Nature

Chirality in Nature

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.

Radical Chain-Growth Polymerization: Chain Branching

Radical Chain-Growth Polymerization: Chain Branching

The skeletal structure of polymers synthesized via radical polymerization is always branched. For example, the polymerization of ethylene by radical polymerization results in a low-density grade of polyethylene with a heavily branched skeletal structure. Here, the radical site abstracts hydrogen from the growing chain, and the radical site shifts from the end (a primary carbon center) to anywhere within the growing chain (a secondary carbon center). Consequently, the part of the chain from the...

Molecules with Multiple Chiral Centers

Molecules with Multiple Chiral Centers

Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...

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Related Experiment Video

Updated: Dec 11, 2025

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

Published on: July 2, 2018

Construction of 1D Vortex Chain Using a Chiral Nanostructure.

Zhenghua Li¹, Bin Dong¹, Yangyang He¹

¹Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission School of Physics and Materials Engineering Dalian Minzu University Dalian 116600 China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|August 25, 2020

Summary

Researchers developed a novel chiral nanostructure to create high-order coupled magnetic vortices. This breakthrough enables control over vortex chains and spin wave propagation for advanced magnetic devices.

Keywords:

chirality magnetic force microscopy magnetic vortex spin waves (SWs)

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Last Updated: Dec 11, 2025

Fabrication of Magnetic Nanostructures on Silicon Nitride Membranes for Magnetic Vortex Studies Using Transmission Microscopy Techniques

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Published on: July 2, 2018

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Published on: November 12, 2014

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Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Controlling high-order coupled magnetic vortices is crucial for advancing magnetic vortex applications.
Previous methods were limited to double-coupled vortices in ferromagnetic nanostructures.

Purpose of the Study:

To present an effective approach for constructing and controlling high-order coupled vortex structures.
To explore the modulation of vortex chains and spin wave propagation using chiral nanostructures.

Main Methods:

Utilized structured Fe4N nanostrips and bias nanomagnets to create chiral nanostructures.
Investigated the construction of double-vortex, triple-vortex, and n-vortex chains.
Analyzed spin wave propagation along modulated domain walls.

Main Results:

Successfully constructed high-order coupled vortex chains (double, triple, and n-vortex).
Demonstrated control over vortex transport and hybridization.
Observed spin wave propagation along domain walls at 1.2 GHz, spreading into domains at 5.0 GHz.

Conclusions:

Chiral nanostructures offer an effective route to high-order coupled magnetic vortices.
This technique allows modulation of vortex chains for controlled spin wave propagation.
Presents new possibilities for designing magnetic vortex-based devices.