The secret of how false
The original version from This story back Quanta magazine.
Since their discovery in 1982, we have devoted physicists and chemists. Their atoms make themselves in Pennsylvania chains, decorations and other shapes to form a pattern that has never been repeated. These patterns seem to disobey laws and witnesses. How can the atoms be able to make non -professional arrangements without an advanced mathematics understanding?
“The semi -crystals are one of the things you love as a physical world, when you learn about it first,” said Wenhao Sun, a scientist at the University of Michigan. “
However, recently, some of their secrets have returned. In one of the studies, the sun and colleagues adapted a way to study the crystals to determine that at least some of the pseudo-dynamic cracols are stable dynamic-the stomach does not fall into low energy. This discovery helps explain how and why Pseudo -form. The second study contains a new method of semi -crystalline engineering and observes it in the formation process. The third -known research group recorded the unknown properties of these unusual materials.
Historically, semi -solid crystals were difficult to create and describe.
“There is no doubt that they have interesting characteristics,” said Sharon Glutzer, a computing physicist at Michigan University. “But it is unable to make it mainly, on their industrial scale[that] Not feeling, but I think it explains to us how to do this repeatedly. “
The symmetry “prohibited”
Nearly a decade ago, the Israeli Dan Schchertman Dan Schchertman discovered the first examples of crystals in the laboratory, and Roger Pinarose, the British mathematician, almost believed to have been revealed in these materials.
Penrose has created a group of tiles that could cover an endless plane without incision and overlap, in non -repeated and repeated patterns. Unlike the settlements made of triangles, rectangles and Sadasis – they show correspondence in two, three, four or six similar axes and the tile space in periodic patterns – with Pennos eloquence is five times “forbidden”. Fived tiles are formed, but claws cannot be placed together on the tiles on the plane. Therefore, while the tiles aligned along the five axes and without interruption, the different parts of this style only look. It is impossible to repeat precisely. Penrose Devils covered covered with American scientific In 1977, five years before jumping from pure mathematics to the real world.
