Human writing and drawing are at least 30,000 years predates traditional techniques such as carving, engraving and ink printing/writing, as well as electron lithography It also includes newer methods such as. Small Now, a team of German physicists have, according to a paper recently published in the journal writing on water and other liquid surfaces He found a unique method for
How is it possible to write on water?
According to the authors, most classical writing methods involve the same basic approach, such as carving a line or laying down ink. On a solid substrate, strong intermolecular forces help inscribed shapes maintain their shape, but this is not the case for surfaces immersed in liquids. That’s why scientists have developed a unique method for this type of surface.
From Johannes Gutenberg Universitaet Mainz co-author To Thomas Palberg According to him, the solution to this is to put the ink directly into the water and use it as a pen. ion made of exchange material, 20 to 50 microns in diameter Using a microbead varying between . In this way, the bead remains so small compared to the “ink” chamber that it does not create any vortex.
The bead “writes” by changing the local pH of the water, attracting ink particles to these areas. It is possible to “write” a letter in water by moving the bead in a trajectory that follows the letter or character it is trying to draw. The ink particles then accumulate along this trajectory, and as a result, you write whatever you want on the water.
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Palberg emphasizes that this study is primarily a proof of principle and that their research is still very preliminary. But the team thinks their method should be able to reproduce any type of writing that uses continuous lines. It may even be possible to make cuts between individual letters by turning the ion exchange process on and off when necessary, or by deleting and/or correcting what is “written”.
Researchers find sensitive to UV light “sticky” He thinks using inks can help keep lines and letters in place longer. from TU Darmstadt co-author Benno Liebchen, “In addition to beads made of ion-exchange resins, ‘pencils’ composed of particles that can be heated with lasers or even individually steerable microswimmers can be used.” said.
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