Related Experiment Video
Updated: Dec 31, 2025
08:04
Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
Published on: November 26, 2019
7.5K
Active rotational dynamics of a self-diffusiophoretic colloidal motor.
Shang Yik Reigh1, Mu-Jie Huang, Hartmut Löwen
1The Research Institute of Basic Sciences, Seoul National University, Seoul 08826, Republic of Korea. silee@snu.ac.kr.
Soft Matter
|January 7, 2020
Summary
Synthetic colloidal motors achieve active rotational motion through self-diffusiophoresis. Variations in catalytic domain shape and reaction rates break symmetry, enabling controlled movement for applications like cargo transport.
Area of Science:
- Colloidal science
- Chemical physics
- Soft matter physics
Background:
- Chemically-powered synthetic colloidal motors exhibit complex dynamics.
- Self-diffusiophoresis is a key mechanism driving motor activity.
- Symmetry breaking is crucial for directed motion in microscale systems.
Purpose of the Study:
- To investigate the active rotational dynamics of spherical colloidal motors.
- To understand how catalytic domain shape influences motor motion.
- To explore the role of self-generated concentration gradients in motor behavior.
Main Methods:
- Utilizing continuum theory to model motor dynamics.
- Employing particle-based simulations for detailed analysis.
- Investigating motors with catalytic domains of arbitrary shapes.
Main Results:
- Demonstrated that broken spherical symmetry, due to catalytic domain variations, induces active rotational motion.
- Quantified the relationship between catalytic domain size/shape and chemical reaction rates.
- Provided a theoretical and simulation-based description of the factors governing rotational dynamics.
Conclusions:
- Catalytic domain characteristics are critical for controlling synthetic motor rotation.
- Understanding these dynamics is essential for designing motors for targeted cargo transport.
- The findings have implications for collective behaviors in multi-motor systems.
More Related Videos
Related Concept Videos
01:22Mechanical Systems
523
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
523
01:09Rolling Without Slipping
5.0K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
5.0K
01:17Colloids and Suspensions
2.9K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
2.9K
01:05Mechanism of Ciliary Motion
4.7K
The ciliary structures were first seen in 1647 by Antonie Leeuwenhoek while observing the protozoans. In lower organisms, these appendages are responsible for cell movement, while in higher organisms, these appendages help in the movement of the extracellular fluids within the body cavities.
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
The cilia are made up of microtubules in a 9+2 arrangement, with nine microtubule doublet ring bundles, surrounding a pair of central singlet microtubule bundles. The doublet microtubule bundles are...
4.7K
01:05Static and Kinetic Frictional Force
24.9K
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
However, if two systems are in contact and are stationary relative to one...
24.9K
01:16Equation of Motion: General Plane motion - Problem Solving
440
Consider a lawn roller with a mass of 100 kg, a radius of 0.2 meters, and a radius of gyration of 0.15 meters. A force of 200 N is applied to this roller, angled at 60 degrees from the horizontal plane. What will be the angular acceleration of the lawn roller?
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
The friction between the roller and the ground is characterized by two coefficients. The static friction coefficient is 0.15, while the kinetic friction coefficient is 0.1. These values are crucial in understanding the interaction between...
440