Self-solidifying active droplets showing memory-induced chirality
arXiv:2302.04195 · doi:10.1002/advs.202300866
Abstract
Most synthetic microswimmers do not reach the autonomy of their biological counterparts in terms of energy supply and diversity of motion. Here we report the first all-aqueous droplet swimmer powered by self-generated polyelectrolyte gradients, which shows memory-induced chirality while self-solidifying. An aqueous solution of surface tension-lowering polyelectrolytes self-solidifies on the surface of acidic water, during which polyelectrolytes are gradually emitted into the surrounding water and induce linear self-propulsion via spontaneous symmetry breaking. The low diffusion coefficient of the polyelectrolytes leads to long-lived chemical trails which cause memory effects that drive a transition from linear to chiral motion without requiring any imposed symmetry breaking. The droplet swimmer is capable of highly efficient removal (up to 85%) of uranium from aqueous solutions within 90 min, benefiting from self-propulsion and flow-induced mixing. Our results provide a route to fueling self-propelled agents which can autonomously perform chiral motion and collect toxins.
References in corpus (30)
- Active Particles in Complex and Crowded Environments
- Self-motile colloidal particles: from directed propulsion to random walk
- Swimming in circles: Motion of bacteria near solid boundaries
- Circular motion of asymmetric self-propelling particles
- Self-propulsion of pure water droplets by spontaneous Marangoni stress driven motion
- Chemotaxis and auto-chemotaxis of self-propelling artificial droplet swimmers
- Dynamics of a Brownian circle swimmer
- Gravitaxis of asymmetric self-propelled colloidal particles
- Hydrodynamic capture of microswimmers into sphere-bound orbits
- Targeted Assembly and Synchronization of Self-Spinning Microgears
- The Rotating Vicsek Model: Pattern Formation and Enhanced Flocking in Chiral Active Matter
- Inertial delay of self-propelled particles
- Sorting of Chiral Microswimmers
- Self-propulsion of chemically-active droplets
- Curling Liquid Crystal Microswimmers: a cascade of spontaneous symmetry breaking
- Bacteria display optimal transport near surfaces -- bacteria as intermittent active chiral particles: trapped by hydrodynamics, escaping by adhesion
- Memory-induced transition from a persistent random walk to circular motion for achiral microswimmers
- Activity induced synchronization: From Mutual Flocking to Chiral Self-Sorting
- Viscotaxis: microswimmer navigation in viscosity gradients
- Active particles in viscosity gradients
- Self-assembly of colloidal molecules due to self-generated flow
- Active Curved Polymers form Vortex Patterns on Membranes
- Chemotactic self-caging in active emulsions
- Nonlinear dynamics of a chemically-active drop: from steady to chaotic self-propulsion
- Spontaneously rotating clusters of active droplets
- Dynamical Crystallites of Active Chiral Particles
- Rechargeable self-assembled droplet microswimmers driven by surface phase transitions
- Self-solidifying active droplets showing memory-induced chirality
- Surfactant-loaded capsules as Marangoni microswimmers at the air-water interface: Symmetry breaking and spontaneous propulsion by surfactant diffusion and advection
- Self-avoidant memory effects on enhanced diffusion in a stochastic model of environmentally responsive swimming droplets