Magnetically Driven Manipulation of Nonmagnetic Liquid Marbles: Billiards with Liquid Marbles

Liquid marbles are droplets encapsulated by a layer of hydrophobic nanoparticles and have been extensively employed in digital microfluidics and lab-on-a-chip systems in recent years. In this study, magnetic liquid marbles were used to manipulate nonmagnetic liquid marbles. To achieve this purpose,...

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Bibliographic Details
Published in:Micromachines (Basel) 2022-12, Vol.14 (1), p.49
Main Authors: Azizian, Parnian, Mohammadrashidi, Mahbod, Abbas Azimi, Ali, Bijarchi, Mohamad Ali, Shafii, Mohammad Behshad, Nasiri, Rohollah
Format: Article
Language:English
Subjects:
Billiards
Contact angle
digital microfluidics
Electromagnets
ferrofluid
Ferrofluids
Inelastic collisions
liquid marble
liquid marble manipulation
Magnetic fields
Magnetic fluids
magnetic manipulation
Marble
Methods
Microfluidics
Nanoparticles
Projectiles
Viscosity
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Summary:Liquid marbles are droplets encapsulated by a layer of hydrophobic nanoparticles and have been extensively employed in digital microfluidics and lab-on-a-chip systems in recent years. In this study, magnetic liquid marbles were used to manipulate nonmagnetic liquid marbles. To achieve this purpose, a ferrofluid liquid marble (FLM) was employed and attracted toward an electromagnet, resulting in an impulse to a water liquid marble (WLM) on its way to the electromagnet. It was observed that the manipulation of the WLM by the FLM was similar to the collision of billiard balls except that the liquid marbles exhibited an inelastic collision. Taking the FLM as the projectile ball and the WLM as the other target balls, one can adjust the displacement and direction of the WLM precisely, similar to an expert billiard player. Firstly, the WLM displacement can be adjusted by altering the liquid marble volumes, the initial distances from the electromagnet, and the coil current. Secondly, the WLM direction can be adjusted by changing the position of the WLM relative to the connecting line between the FLM center and the electromagnet. Results show that when the FLM or WLM volume increases by five times, the WLM shooting distance approximately increases by 200% and decreases by 75%, respectively.
ISSN:2072-666X
2072-666X
DOI:10.3390/mi14010049