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Spontaneous autophoretic motion of isotropic particles

Michelin, Sébastien ; Lauga, Eric ; Bartolo, Denis

Physics of fluids (1994), 2013-06, Vol.25 (6) [Periódico revisado por pares]

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Título:
Spontaneous autophoretic motion of isotropic particles
Autor: Michelin, Sébastien ; Lauga, Eric ; Bartolo, Denis
Assuntos: Asymmetry ; Colloids ; Engineering Sciences ; Fluid dynamics ; Fluid flow ; Fluid mechanics ; Fluids ; Fluids mechanics ; Hierarchies ; Mechanics ; Peclet number ; Physics ; Spontaneous
É parte de: Physics of fluids (1994), 2013-06, Vol.25 (6)
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
Descrição: Suspended colloidal particles interacting chemically with a solute can self-propel by autophoretic motion when they are asymmetrically patterned (Janus colloids). Here we demonstrate theoretically that such anisotropy is not necessary for locomotion and that the nonlinear interplay between surface osmotic flows and solute advection can produce spontaneous and self-sustained motion of isotropic particles. Solving the classical autophoretic framework for isotropic particles, we show that, for given material properties, there exists a critical particle size (or Péclet number) above which spontaneous symmetry-breaking and autophoretic motion occur. A hierarchy of instabilities is further identified for quantized critical Péclet numbers.
Editor: American Institute of Physics
Idioma: Inglês

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