Many-body dynamics of chemically propelled nanomotors

被引:45
作者
Colberg, Peter H. [1 ]
Kapral, Raymond [1 ]
机构
[1] Univ Toronto, Dept Chem, Chem Phys Theory Grp, Toronto, ON M5S 3H6, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
ACTIVE BROWNIAN PARTICLES; MESOSCOPIC MODEL; PHASE-SEPARATION; BEHAVIOR; HYDRODYNAMICS; MOTION; DIFFUSIOPHORESIS; SPHERES; STATE;
D O I
10.1063/1.4997572
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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. Published by AIP Publishing.
引用
收藏
页数:11
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