Mode Selection in the Spontaneous Motion of an Alcohol Droplet

Abstract

An alcohol (pentanol) droplet exhibits spontaneous agitation on an aqueous solution, driven by a solutal Marangoni effect. We found that the droplet's mode of motion is controlled by its volume. A droplet with a volume of less than $0.1\mu \mathrm{l}$ shows irregular translational motion, whereas intermediate-sized droplets of $0.1-200\mu \mathrm{l}$ show vectorial motion. When the volume is above $300\mu \mathrm{l}$, the droplet splits into smaller drops. These experimental results regarding mode selection are interpreted in terms of the wave number selection depending on the droplet volume.

4 pages, 5 figures

References in corpus (2)

• Self Running Droplet: Emergence of Regular Motion from Nonequilibrium Noise
• Dynamical Model for Chemically Driven Running Droplets

Cited by in corpus (41)

• Tuned, driven, and active soft matter
• Self-Propelled Motion of a Droplet Induced by Marangoni-driven Spreading
• Drift instability in the motion of a fluid droplet with a chemically reactive surface driven by Marangoni flow
• Spontaneous motion of a droplet coupled with a chemical wave
• Active crystals and their stability
• Self-propelled motion of a fluid droplet under chemical reaction
• A bouncing oil droplet in a stratified liquid and its sudden death
• Spontaneous motion and deformation of a self-propelled droplet
• Deformation of a self-propelled domain in an excitable reaction-diffusion system
• Dynamics of a deformable self-propelled domain
• Unidirectional laning and migrating cluster crystals in confined self-propelled particle systems
• Oscillatory Motion of a Camphor Grain in a One-Dimensional Finite Region
• Rotational motion of a droplet induced by interfacial tension
• Dynamics of a deformable active particle under shear flow
• Getting drowned in a swirl: deformable bead-spring model microswimmers in external flow fields
• Dynamics of a deformable self-propelled particle under external forcing
• A deformable microswimmer in a swirl: capturing and scattering dynamics
• Spontaneous motion of a camphor particle with a triangular modification from a circle
• Spinning motion of a deformable self-propelled particle in two dimensions
• Lattice Boltzmann study of chemically-driven self-propelled droplets
• From diffusive mass transfer in Stokes flow to low Reynolds number Marangoni boats
• Individual and collective dynamics of self-propelled soft particles
• Imperfect bifurcation in the rotation of a propeller-shaped camphor rotor
• General Criteria for Determining Rotation or Oscillation in a Two-dimensional Axisymmetric System
• Two floating camphor particles interacting through lateral capillary force
• Swinging Motion of Active Deformable Particles in Poiseuille Flow
• Janus droplet as a catalytic micromotor
• Spontaneous deformation and fission of oil droplets on an aqueous surfactant solution
• Focusing by blocking: repeatedly generating central density peaks in self-propelled particle systems by exploiting diffusive processes
• On a simple model that explains inversion of a self-propelled rotor under periodic stop and release operations
• Dynamics of Deformable Active Particles under External Flow Field
• Traveling pulses with oscillatory tails, figure-eight-like stack of isolas, and dynamics in heterogeneous media
• Simple mathematical model for a pairing-induced motion of active and passive particles
• Active colloid with externally induced periodic bipolar motility and its cooperative motion
• Chemo-capillary instabilities of a contact line
• Modeling of chemically active particles at an air-liquid interface
• Dynamic Labyrinthine Pattern in an Active Liquid Film
• Deformation dynamics of an oil droplet into a crescent shape during intermittent motion
• Gradient dynamics model for chemically driven running drops
• Short-time approximate solutions of an equation modeling a camphor motion
• Energetics-based model for a diffusiophoretic motion of a deformable droplet