Imagine how many trees have been torn down daily just for us to have something to write on. As well as the massive carbon emissions released into the atmosphere from burning papers. Luckily for the world, brilliant minds have invented a stupefying paper which has promising features, and may even help save the planet.
Yadong Yin his colleagues at the University of California at Riverside have created a type of paper that can be printed on using light, erased by heating, and reused up to 80 times.
Experts developed an efficient photoreversible color switching systems for constructing rewritable paper (c) pubs.acs.org
The team used nanoparticles, Prussian blue dye or its chemical analogues, and titanium oxide. They applied these materials in a normal paper to produce an extraordinary product.
The paper works when electrons from titanium oxide move to the dye in the nanoparticle when the coating is exposed to ultraviolet light. The surge of electrons makes the blue dye turn white. Thus, the user of the unique paper can print white words on a blue background, or blue words on a white background by focusing the ultraviolet light on the paper.
When you don't need normal papers anymore
The paper reverts to its original state after five days if not used. However, the ink can be removed faster by accelerating the process, which can be done by heating the paper to 120 °C (250 °F) for 10 minutes.
This paper is truly astounding. Aside from it doesn't need an ink for printing, but only light, it also has cheap and easily attainable ingredients.
Yin’s team is now working on an out-of-the-box idea for printer, which will probably be cheap and as jaw-dropping!