Many-body dynamics of chemically propelled nanomotors
| Autor: | Peter H. Colberg, Raymond Kapral |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Collective behavior
Materials science Dynamics (mechanics) Intermolecular force Degrees of freedom (physics and chemistry) General Physics and Astronomy FOS: Physical sciences Context (language use) Condensed Matter - Soft Condensed Matter 01 natural sciences 010305 fluids & plasmas Coupling (physics) Chemical physics 0103 physical sciences Soft Condensed Matter (cond-mat.soft) SPHERES Physical and Theoretical Chemistry 010306 general physics Brownian motion |
| DOI: | 10.48550/arxiv.1703.03034 |
| Popis: | The collective behavior of chemically propelled sphere-dimer motors made from linked catalytic and noncatalytic spheres in a quasi-two-dimensional confined geometry is studied using a coarse-grained microscopic dynamical model. Chemical reactions at the catalytic spheres that convert fuel to product generate forces that couple to solvent degrees of freedom as a consequence of momentum conservation in the microscopic dynamics. The collective behavior of the many-body system is influenced by direct intermolecular interactions among the motors, chemotactic effects due to chemical gradients, hydrodynamic coupling, and thermal noise. Segregation into high and low density phases and globally homogeneous states with strong fluctuations are investigated as functions of the motor characteristics. Factors contributing to this behavior are discussed in the context of active Brownian models. Comment: 13 pages, 12 figures |
| Databáze: | OpenAIRE |
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