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Impingement-assisted self-assembly of ferrofluid droplets under magnetic field.
- Source :
-
Applied Physics Letters . 8/14/2021, Vol. 119 Issue 4, p1-5. 5p. - Publication Year :
- 2021
-
Abstract
- The unique liquid nature and strong magnetic response ability enable ferrofluid droplets to split and self-assemble into reconfigurable three-dimensional structures. Although the manipulation of a ferrofluid droplet in a static or quasi-static state has been well studied, the splitting and self-assembly of ferrofluids in a dynamic state remain unexplored. Here, we report the impingement-assisted self-assembly of ferrofluids on superhydrophobic surfaces, whereby the required magnetic field is greatly reduced. In particular, the coupling between the magnetic field strength and Weber number endows a precise regulation of the ferrofluid post-impact dynamics, which facilitates the optimization of the self-assembly behavior. Finally, we demonstrate that the impingement-assisted self-assembly of ferrofluids can be generalized on various surfaces with different wettability. The fundamental understanding and the ability to self-assembly during droplet impingement can provide important insight into the dynamics of ferrofluid droplets as well as the applicability in multifunctional analytical and fluidic devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 119
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 151705182
- Full Text :
- https://doi.org/10.1063/5.0059420