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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...
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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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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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  11. Condensation And Synchronization In Aligning Chiral Active Matter.

Condensation and Synchronization in Aligning Chiral Active Matter.

Yujia Wang1, Bruno Ventéjou2, Hugues Chaté2,3,4

  • 1Center for Soft Condensed Matter Physics and Interdisciplinary Research, <a href="https://ror.org/05t8y2r12">Soochow University</a>, Suzhou 215006, China.

Physical Review Letters
|January 3, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Spontaneous density segregation in circle swimmers forms condensates, not phase separation. These vortex-like structures absorb particles and synchronize, challenging typical active matter behavior.

Area of Science:

  • Physics
  • Active Matter Physics
  • Statistical Mechanics

Background:

  • Two-dimensional active matter typically exhibits phase separation.
  • Circle swimmers are a model system for studying collective behavior in active matter.
  • Understanding spontaneous pattern formation is key to active matter physics.

Purpose of the Study:

  • To investigate the nature of spontaneous density segregation in dense systems of aligning circle swimmers.
  • To characterize the emergent structures and their properties.
  • To compare these findings with established phase separation models.

Main Methods:

  • Simulations at both particle and continuous levels.
  • Analysis of systems with ferromagnetic and nematic alignment.
  • Inclusion of both identical and disordered chiralities.

Related Experiment Videos

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10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

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Main Results:

  • Density segregation manifests as a condensation phenomenon, distinct from phase separation.
  • Condensates form vortex or rotating polar packet structures.
  • These condensates absorb a significant fraction of particles and maintain size with increasing mass.
  • Condensation leads to synchronization, despite local interactions in 2D.

Conclusions:

  • The study reveals a novel condensation mechanism in 2D active matter systems.
  • Emergent synchronized vortex structures challenge conventional phase separation paradigms.
  • A phenomenological theory is proposed to explain the observed condensation and synchronization.