Scientists used a process called 'diffusioosmosis' to write words that lingered in liquid water.
Scientists have discovered a way to write directly into liquid water, creating clear and long-lasting patterns which float below the surface of the fluid.
Image 1 of 3The team's liquid mixture, which contains a low concentration of charged particles called ions, acts as the"paper." The"ink" is made up of large colloidal particles, which are dispersed thinly through the entire solution. The"pen" is a single small ion-exchange bead — a particle which is able to swap the charged particles in the liquid mixture for different, smaller charged particles.
Image 1 of 3"Importantly, because the pen is small, it doesn't disturb the surrounding solvent too much — a larger pen would agitate the water and destroy what you were writing," Liebchen said."The colloidal particles are too big and heavy to move much in still water within the time scales of the experiment which is why the lines remain visible."
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