Control and manipulation of ferrofluid drops on functionalized surfaces
| Autor: | Rigoni, Carlo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
FIS/03 Fisica della materia
wetting breaking magnetic sliding microfluidics deformation microfluidics ferrofluids wetting drops magnetic magnet sliding pattern division deformation breaking functionalized impregnated LIS ferrofluids LIS pattern magnet Settore FIS/03 - Fisica della Materia functionalized division impregnated drops |
| Popis: | Controlling and predicting the mobility of drops in contact with a solid surface is attracting a lot of attention thanks to its fundamental implications and technological applications. The interaction between ferrouids and magnetic fields allow to obtain controlled deformation of the ferrouid-air interface and control of motion. In this thesis we will show how ferrouid droplets represent an ideal playground for fundamental studies on drop dynamics and provide useful strategies for passive and active control of drop motion. In particular, after a brief introduction about microuidics and ferrouids, we will report results about the possibility to control the shape of droplets thanks to the interaction with magnetic fields of different strenght and gradient produced by permanent magnets. After that we will show how magnetic fields can be used to passively control the motion of ferrouid drops sliding down inclined planes and, in the end, we will describe how it is possible to obtain the division of a single drop in two daughter droplets taking advantage of a strong interaction with the magnetic field. |
| Databáze: | OpenAIRE |
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