Related Experiment Video
Updated: Mar 26, 2026
09:00
Cargo Loading onto Kinesin Powered Molecular Shuttles
Published on: November 3, 2010
11.1K
Ratchet transport powered by chiral active particles.
1Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China.
Scientific Reports
|January 23, 2016
Summary
Chiral active particles drive ratchet transport in asymmetric channels. Particle chirality dictates active particle movement, while passive particle motion depends on multiple factors, enabling potential separation and optimized efficiency.
Area of Science:
- Physics
- Soft Matter Physics
- Statistical Mechanics
Background:
- Active matter systems exhibit complex behaviors driven by internal energy conversion.
- Ratchet mechanisms utilize asymmetry to generate directed motion from random fluctuations.
- Chiral active particles introduce rotational dynamics influencing transport phenomena.
Purpose of the Study:
- To numerically investigate the ratchet transport of mixed active and passive particles.
- To analyze the influence of particle chirality and system asymmetry on directed motion.
- To identify conditions for particle separation and optimize transport efficiency.
Main Methods:
- Numerical simulations of particle dynamics in a transversal asymmetric channel.
- Modeling of a large passive particle within a sea of chiral active particles.
- Systematic variation of parameters: chirality, self-propulsion speed, packing fraction, and channel geometry.
Main Results:
- Active particle transport direction is determined by chirality; counterclockwise and clockwise particles move oppositely.
- Passive particle transport is complex, influenced by chirality, self-propulsion, and packing fraction.
- Opposite transport directions observed: passive particles left, active particles right, under specific conditions.
- Optimal parameters identified for maximizing rectified efficiency.
Conclusions:
- Chiral active particles can induce and control ratchet transport in asymmetric channels.
- The interplay of chirality, self-propulsion, and density governs passive particle behavior.
- Potential for selective particle separation and efficient directed transport exists.
- Findings provide a basis for experimental realization of chiral active particle-powered ratchets.
More Related Videos
09:34Microfluidic Pneumatic Cages: A Novel Approach for In-chip Crystal Trapping, Manipulation and Controlled Chemical Treatment
Published on: July 12, 2016
10.1K
10:52Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
Published on: July 27, 2022
3.5K
Related Concept Videos
02:05Prochirality
5.3K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
5.3K
02:30Chirality in Nature
17.9K
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.
17.9K
02:30Racemic Mixtures and the Resolution of Enantiomers
22.8K
A racemic mixture, or racemate, is an equimolar mixture of enantiomers of a molecule that can be separated using their unique interaction with chiral molecules or media. Racemic mixtures are denoted by the (±)- prefix. This ‘optical rotation descriptor’ applies to the whole solution of a racemic mixture rather than a specific stereoisomer. Enantiomers typically have the same physical and chemical properties. Hence, they are not easily separable. However, enantiomers can exhibit...
22.8K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
7.4K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
7.4K
02:24Properties of Enantiomers and Optical Activity
23.3K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
23.3K
02:25Chirality
32.2K
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...
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...
32.2K