Abstract
Droplet Manipulation In article number 2100178, Fernando Benito-Lopez, Lourdes Basabe-Desmonts, and Vahid Nasirimarekani show that the interaction between an oil-based ferrofluid and a drop of water results in the formation of a ferrofluid ring around the drop of water. The ring behaves like a soft matter dipole, disappearing once the magnetic field is removed. The set takes the shape of a cupcake and allows precise movement of the drop on a surface, even on inverted surfaces.
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