Arrested on heating: controlling the motility of active droplets by temperature
arXiv:2303.13442 · doi:10.1002/adma.202416813
Abstract
Self-propelling active matter relies on the conversion of energy from the undirected, nanoscopic scale to directed, macroscopic motion. One of the challenges in the design of synthetic active matter lies in the control of dynamic states, or motility gaits. Here, we present an experimental system of self-propelling droplets with thermally controllable and reversible dynamic states, from unsteady over meandering to persistent to arrested motion. These states are known to depend on the Péclet number of the molecular process powering the motion, which we can now tune by using a temperature sensitive mixture of surfactants as propulsion fuel. We quantify the droplet dynamics by analyzing flow and chemical fields for the individual states, comparing them to canonical models for autophoretic particles. In the context of these models, we experimentally observe, in situ, the fundamental first broken symmetry that translates an isotropic, immotile base state to self-propelled motility.
References in corpus (23)
- Active Particles in Complex and Crowded Environments
- Self-propulsion of pure water droplets by spontaneous Marangoni stress driven motion
- Chemotaxis and auto-chemotaxis of self-propelling artificial droplet swimmers
- Spontaneous autophoretic motion of isotropic particles
- Self-propulsion of chemically-active droplets
- Time-(ir)reversibility in active matter: from micro to macro
- Flow-induced phase separation of active particles is controlled by boundary conditions
- Phoretic Interactions Between Active Droplets
- Swimming active droplet: A theoretical analysis
- Chemotactic self-caging in active emulsions
- Nonlinear dynamics of a chemically-active drop: from steady to chaotic self-propulsion
- Reconfigurable Artificial Microswimmers with Internal Feedback
- A parallel interaction potential approach coupled with the immersed boundary method for fully resolved simulations of deformable interfaces and membranes
- We the Droplets: A Constitutional Approach to Active and Self-Propelled Emulsions
- Oscillatory rheotaxis of active droplets in microchannels
- Spontaneously rotating clusters of active droplets
- Topological Stabilization and Dynamics of Self-propelling Nematic Shells
- Rechargeable self-assembled droplet microswimmers driven by surface phase transitions
- Instabilities driven by diffusio-phoretic flow on catalytic surfaces
- Self-propelling colloidal finite state machines
- Rheotaxis of Active Droplets
- Swimming droplet in 1D geometries, an active Bretherton problem
- Interfacial activity dynamics of confined active droplets