Artículos de revistas
Wrinkled labyrinths in critical demixing ferrofluid
Fecha
2017-01Registro en:
Wilke, Natalia; Bugase, Jonas; Treffenstädt, Lisa-Marie; Fischer, Thomas M.; Wrinkled labyrinths in critical demixing ferrofluid; Royal Society of Chemistry; Soft Matter; 13; 40; 1-2017; 7307-7311
1744-683X
1744-6848
CONICET Digital
CONICET
Autor
Wilke, Natalia
Bugase, Jonas
Treffenstädt, Lisa-Marie
Fischer, Thomas M.
Resumen
A thin film of a critical ferrofluid mixture undergoes a sequence of transitions in a magnetic field. First the application of a field induces a critical demixing of the fluid into cylindrical droplets of the minority phase immersed in an extended majority phase. At a second critical field the cylindrical shape is destabilized and transforms into a labyrinth pattern. A third wrinkling transition occurs at even higher field if the liquid has a liquid/air interface. The wrinkling is absent if the droplet has a cover-slide on top. We explain the wrinkling by the wetting behavior of the liquid/air interface that shifts the surface region away from a critical demixing point.