An anonymous reader quotes a report from Quartz: Nearly 1% of carbon emissions annually can be attributed to paper production, even though we recycle much of the paper we produce. Yadong Yin has a solution. He and his colleagues at the University of California at Riverside have invented a type of paper that can be printed on using just light, erased by heating, and reused up to 80 times. Yin created nanoparticles, which are a million times smaller than the thickness of human hair, with the dye Prussian blue, or its chemical analogues, and titanium oxide, which is commonly used in white wall paint. This mixture is then applied to normal paper. When the coating is exposed to ultraviolet light, electrons from titanium oxide move to the dye in the nanoparticle. This addition of electrons makes the blue dye turn white. Focusing the ultraviolet light into shapes, you can print white words on a blue background — or blue words on a white background, which are easier to read. If left alone, the paper reverts to its original state in five days. That process can be accelerated by heating the paper to 120 C (250 F) for 10 minutes. Read more of this story at Slashdot.
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Scientists Have Invented Paper That You Can Print With Light, Erase With Heat, and Reuse 80 Times
schwit1 quotes a report from Digital Trends: In this generation of self-starters and self-made women and men, do-it-yourself isn’t just an option, it’s a way of life. And if there’s not an app for that, chances are there’s a YouTube video for it. That was certainly the case for a woman named Cara Brookins, who is living proof that if you’re willing to learn, you absolutely can. In 2008, Brookins was in the midst of a family struggle, having left a husband she called “violent and abusive.” Looking to make a fresh start for herself, she took the idea of rebuilding quite literally, perhaps using the physical experience of constructing a house as an extension of her emotional and mental journey. Though she had no previous experience in construction or architecture, Brookins found a series of YouTube tutorials on building a home and got to work. Over the course of nine months, Brookins worked tirelessly with the help of her four children to build a new home for themselves. “I had rented this cabin for a Thanksgiving getaway, ” the mother of four told CBS News. “And driving there, we passed this house that had been ravaged by a tornado. It was this beautiful dream house and it was sort of wide open. You don’t often get the opportunity to see the interior workings of a house, but looking at these 2x4s and these nails, it just looked so simple. I thought, “I could put this wall back up if I really tried. Maybe I should just start from scratch.'” Read more of this story at Slashdot.