Pulling and Pushing a Cargo With a Catalytically Active Carrier

Abstract

Catalytically active particles suspended in a liquid can move due to self-phoresis by generating solute gradients via chemical reactions of the solvent occurring at parts of their surface. Such particles can be used as carriers at the micro-scale. As a simple model for a carrier-cargo system we consider a catalytically active particle connected by a thin rigid rod to a catalytically inert cargo particle. We show that the velocity of the composite strongly depends on the relative orientation of the carrier-cargo link. Accordingly, there is an optimal configuration for the linkage. The subtlety of such carriers is underscored by the observation that a spherical particle completely covered by catalyst, which is motionless when isolated, acts as a carrier once attached to a cargo.

6 pages, 2 figures, to appear in EPL (https://www.epletters.net/)

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Cited by in corpus (38)

• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Self-assembly of catalytically active colloidal molecules: Tailoring activity through surface chemistry
• Electrokinetic Effects in Catalytic Pt-Insulator Janus Swimmers
• Zermelo's problem: Optimal point-to-point navigation in 2D turbulent flows using Reinforcement Learning
• Light-controlled Assembly of Active Colloidal Molecules
• Dynamics and efficiency of a self-propelled, diffusiophoretic swimmer
• Self-assembly of Active Colloidal Molecules with Dynamic Function
• Chemistry in Motion: Tiny Synthetic Motors
• Autophoretic locomotion from geometric asymmetry
• Exact solutions for hydrodynamic interactions of two squirming spheres
• Capturing self-propelled particles in a moving microwedge
• Geometric tuning of self-propulsion for Janus catalytic particles
• Effective interaction between active colloids and fluid interfaces induced by Marangoni flows
• Active Colloidal Molecules
• Active colloids in the context of chemical kinetics
• Self-propulsion mechanism of active Janus particles in near-critical binary mixtures
• Exact phoretic interaction of two chemically-active particles
• Many-body dynamics of chemically propelled nanomotors
• Pair Interaction of Catalytically Active Colloids: From Assembly to Escape
• Collisions and rebounds of chemically-active droplets
• Ångström-scale chemically powered motors
• Self-diffusiophoresis induced by fluid interfaces
• Hydrodynamic Swarming of Thermally Active Dimeric Colloids
• Instability and self-propulsion of active droplets along a wall
• Artificial chemotaxis of phoretic swimmers: Instantaneous and long-time behaviour
• Chemically active colloids near osmotic-responsive walls with surface-chemistry gradients
• Optimal tracking strategies in a turbulent flow
• Activated barrier crossing dynamics of a Janus particle carrying cargo
• Surfactant-loaded capsules as Marangoni microswimmers at the air-water interface: Symmetry breaking and spontaneous propulsion by surfactant diffusion and advection
• Active Colloidal Molecules in Activity Gradients
• Hydro-chemical interactions in dilute phoretic suspensions: from individual particle properties to collective organization
• Taxis of cargo-carrying microswimmers in traveling activity waves
• Cargo Towing by Artificial Swimmers
• Nanoconfined catalytic Ångström-size motors
• Control of active polymeric filaments by chemically-powered nanomotors
• Orientational dynamics of a heated Janus particle
• Statistics of carrier-cargo complexes
• Active chiral molecules in activity gradients