Related Experiment Video
Updated: Aug 2, 2026
10:56
Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 21, 2014
Controlling the motion of interacting particles: homogeneous systems and binary mixtures
1Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan. ssavelev@riken.jp
Chaos (Woodbury, N.Y.)
|July 23, 2005
Summary
Particle density controls transport in driven systems. Increasing density can boost or reduce current, offering tunable motion control via interactions and temperature.
Area of Science:
- Physics, specifically condensed matter physics and statistical mechanics.
- Nonlinear dynamics and complex systems.
Background:
- Studies particle transport on asymmetric substrates, a phenomenon known as ratchets.
- Reviews motion control strategies, including those without spatial asymmetry.
Purpose of the Study:
- Investigate particle transport in single-species and binary mixtures under external driving.
- Explore methods for controlling particle motion using density, temperature, and interactions.
Main Methods:
- Employs analytical methods based on nonlinear Fokker-Planck equations.
- Utilizes numerical simulations to validate analytical findings.
Main Results:
- Particle density effectively controls net dc current in ac-driven systems, influenced by temperature and drive amplitude.
- Particle condensation at low temperatures can lead to zero current or efficient rectification.
- For binary mixtures, active particles can control passive particle motion via dragging, rectification, or potential modification.
Conclusions:
- Particle density offers a versatile tool for controlling transport in ratchet systems.
- Interactions and external driving parameters allow for precise manipulation of particle dynamics.
- Binary mixtures provide multiple pathways for active control of passive species motion.
More Related Videos
11:03An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
10:52Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Related Concept Videos
01:23Equilibrium Conditions for a Particle
When an object is in equilibrium, it is either at rest or moving with a constant velocity. There are two types of equilibrium: static and dynamic. Static equilibrium occurs when an object is at rest, while dynamic equilibrium occurs when an object is moving with a constant velocity. In both cases, there must be a balance of forces acting on the object.
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
To understand the concept of equilibrium, let us first consider the forces acting on an object. When different forces act on an object, they can...
01:21Principle of Linear Impulse and Momentum for a System of Particles
In the context of a system of particles moving relative to an inertial frame of reference, the equation of motion is a crucial tool for understanding the dynamics of the system. This equation, which accounts for external forces acting on each particle, plays a fundamental role in describing the system's behavior.
Notably, internal forces between particles, occurring in equal and opposite collinear pairs, cancel out and are not part of the equation of motion. This exclusion simplifies the...
Notably, internal forces between particles, occurring in equal and opposite collinear pairs, cancel out and are not part of the equation of motion. This exclusion simplifies the...
01:28Conservation of Linear Momentum for a System of Particles
In the dynamic realm of billiards, a fascinating interplay of forces governs the motion of cue balls and stationary balls. When the cue ball collides with a stationary ball, linear momentum is exchanged. The cue ball imparts a fraction of its linear momentum to the stationary ball, causing the cue ball to decelerate while initiating the motion of the stationary ball.
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
01:14Equation of Motion: Center of Mass
The equation of motion for a single particle can be expanded to encompass a system of particles consisting of n particles. For any arbitrarily chosen particle within this system, the net force acting upon it is the aggregate of both internal and external forces. Extending this principle to all particles within the system results in the equation of motion for the entire assembly.
Internal forces between any pair of particles manifest as collinear pairs of equal magnitude but opposite directions,...
Internal forces between any pair of particles manifest as collinear pairs of equal magnitude but opposite directions,...
01:28The Thermodynamics of Mixing
Mixing is a fascinating phenomenon in thermodynamics, particularly when considering the Gibbs energy of a mixture at constant temperature and pressure. This energy, denoted as G, tends to decrease during spontaneous mixing processes, offering insights into the composition changes that occur.Imagine two ideal gases, initially separated in different containers, with amounts nA and nB, respectively, both at a temperature T and pressure p. The chemical potentials of these gases have their 'pure'...
01:16Control Volume and System Representations
Two key frameworks are employed to analyze mass, energy, and momentum transfer: the control volume approach and the system approach. These frameworks offer different perspectives, depending on whether the focus is on a specific region in space (control volume approach) or a defined mass of fluid (system approach).
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface. For instance, in the case of water flowing...
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface. For instance, in the case of water flowing...