Discover More: Novel "WRAP" droplet manipulation method invented

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Novel "WRAP" 

droplet manipulation 

method invented

Date Posted: 1st March 2022



Manipulation and transportation of micro-sized droplets have many biomedical and industrial applications. A research team has successfully developed a novel droplet manipulation method called "WRAP" which can transport droplets of different sizes and compositions by electromagnets or programmable electromagnetic fields.

The research team achieved the breakthrough by using ferrofluid, which is a liquid that contains suspended micro, iron particles (ferromagnetic particles) in a solvent. It becomes highly magnetized in the presence of a magnetic field.

When droplets landed on the porous surface, the ferrofluid automatically "wrapped" the droplets because of the surface tension, and hence formed the magnetically responsive ferrofluid ridges surrounding the droplets due to capillary forces.

When an external electromagnetic field was applied, the ferrofluid ridges were magnetically attracted, moving together with the droplets based on the magnetic field direction. So the transportation path could be controlled programmatically through the design of the external magnetic field.

Don't forget to read more on phys.org!
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Source: City University of Hong Kong

Read More: https://phys.org/news/2022-02-scientist-droplet-method.html 

Citation:

staff, S. X. (2022, February 11). Scientist invents novel “WRAP” droplet manipulation method. Phys.org; Phys.org. https://phys.org/news/2022-02-scientist-droplet-method.html

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