Mystery about how to form quasi-cardistal
Original version from This story appeared in How many magazines.
Of their discovery in 1982. year, exotic materials known as quasistans are worried physicists and chemists. Their are atominated in the chains of pentagon, decoctions and other forms to form patterns that never repeat. These forms seem to defeat with physical laws and intuition. How can atoms may “know” how to form elaborate arrangements that do not have non-advanced understanding of mathematics?
“Quasikristists are one of those things that as a scientist, when you first teach about them,” It’s crazy, “Wenhao Sun, a scientist at Michigan University.
Recently, however, Poph’s results peeled out some of their secrets. In one study, the sun and collaborators adjusted the method for the study of crystal to determine that at least some quasi-unskistal stable – their atoms will not be placed in lower energy. This finding helps explain how and why qualistic forms. The second study gave a new way of engineering quater and observe them in the process of formation. And the third research group reported the previously unknown properties of these unusual materials.
Historically, quasi-cards are causing creation and characterization.
“There is no doubt that they have interesting real estate,” Sharon Glotzer said, a calculus physicist who deals at the University of Michigan, but was not involved in this paper. “But we can make them largely, to save them, at the industrial level-[that] He didn’t feel, but I think this will start to show us how to do it reproducibly. “
‘Forbidden’ symmetry
Almost a decade before the Israeli physicist Dan Shechtman revealed the first examples of quasi-card in the laboratory, the British Mathematical Physist Roger Penrose thought of “quasiperiodic” – but not completely repeating the samples that would manifest in those materials.
Penrose developed tile sets that could cover an infinite plane without gap or overlap, in the forms that do not, and cannot, repeat. Unlike testers made from triangles, rectangles and hexagonal shapes that are symmetrical over two, three, four or six-axis and which space in periodic samples – a penetrating sheath have a “prohibited” peripruk symmetry. Tiles make pentagon arrangements, and pentagonies cannot be firmly fit next to each other to sail the aircraft. Thus, while tiles align along with five axes and tests infinitely, different parts of the sample look similar; Exactly repeat is impossible. Quasiperiodic penrose bodies made title Scientific american 1977, five years before they jumped out of pure mathematics in the real world.