Link: Rewritable light-printable, ink-free rewritable paper
(USA, May 2017) Scientists in the U.S are hoping to commercialise a new type of rewritable paper. The paper — a light-printable, ink-free rewritable paper that uses nano technology – has been developed by the Yin Group at the University of California, Riverside, Department of Chemistry led by Professor Yadong Yin, and specialises in the “synthesis and functionalisation of nanostructured materials”.
Yin’s team has published a research paper detailing their latest findings in the field of high-performance light-printable rewritable paper.
The new type of paper can be used and reused up to 20 times. What’s more, it doesn’t require any ink. Its designers think that this new technology could cut down on tons of waste — and save people tons of money.
A special dye embedded in the paper makes it printable and rewritable. The dye goes from dark to clear and back when chemical reactions move electrons around. (Electrons are the subatomic particles that orbit in the outer regions of an atom.) The paper’s color-change chemical undergoes what are known as redox reactions. Redox is short for reduction and oxidation.
To read complete article Go To: Rewritable paper: Prints with light, not ink (Source: from the web)
Cover Image: Chemist Wenshou Wang shows an example of new rewritable paper that he and his coworkers developed. Areas on the paper change from blue to clear, based on whether molecules of its dye gain or lose electrons. (Courtesy: Yin Lab, Univ. Of Calif. Riverside)