Engineers at the Massachusetts Institute of Technology produced a new type of elastic material with a magnetic hair-like structure. This material changes the path of the passing fluid and can even make the water move up against gravity.
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The microciliary is made of nickel and has a total length of about 70 microns and a width of 25 microns, which is about a quarter of the diameter of human hair. The researchers arranged microcilia on elastic transparent silicon. In the experiment, the activated magnetic material can change the fluid flow under the effect of the magnetic field and even filter the sunlight. The researchers said that the work may be used for water resistance and anti-glare, such as "smart windows" for buildings and cars. "You can apply this to the windshield of a car to manipulate rain or sunlight," the researchers said. In the short term, the material will be embedded in lab-on-a-chip devices that will be magnetically guided to study the microchannel flow of cells and other organisms.
This material is inspired by nature. For example, the cilia on both sides of the nasal cavity move back and forth to remove dust or other foreign materials. There are many such dynamic structures in nature, so researchers have expanded their research on microstructures. “
Since the bottom layer of the material is a transparent silicon layer, it can also explore the effect of light arrays. In principle, more complex tilts will bring different effects, and such patterns may be designed for windshield or perspiration absorption. Because the material is flexible, it can even be used for woven fabrics to become rain-proof clothing.