The discovery by Shechtman Daniel has brought a law of science to case: He made a material from which no one believed that it could exist at all. This year's Nobel Prize in chemistry but had to do prior to accepting an uphill battle.
On 8 April 1982 Daniel Shechtman painted three big question marks in his lab book in which he recorded his experiments and their results. He had studied the atomic structure of a metal alloy - and there was clearly something not quite right. At his lab table was a crystal in which the atoms were sorted on a regular basis, but in a way that was considered impossible: The material had a five-fold symmetry.
Why do some arrangements of atoms are allowed
Only objects of certain symmetries can be put together without gaps or stacked one above the other: twice, threefold, fourfold and sixfold symmetries are not a problem - five times already. The tiler Tile a bathroom usually with square tiles, he could also take a triangular or hexagonal - but never five-cornered. Because it can no bathroom tiles - there are always gaps remain.
Order to change
Atomic model of quasicrystals. (Source: Ames Laboratory of the U.S. Department of Energy)
Up to Shechtman's discovery was clear: all crystals are composed of identical units, which are arranged without gaps so that they repeat themselves constantly. Therefore applied to crystals for a long time: five times were forbidden symmetries. Such crystals contradicted what was then considered all the laws of nature.
But Shechtman newly produced material had a five-fold symmetry. At his trial it was an entirely new type of solid: so-called quasicrystals. These are crystals that are built on completely different rules. The building blocks of a quasicrystal never be repeated: you are always surrounded by a different pattern. Nevertheless, there is no chaos here. They arrange themselves on a regular basis. Which only becomes visible with mathematics.
Daniel Shechtman research colleagues mocked him when they heard what he thought he had found. His boss told him at first, read the crystallographic basis textbook again carefully. As researchers continue to insist on the correctness of his test results, he even had to leave his research group - were too embarrassed to head the crazy ideas Shechtman.
Diyos ay Pag-Ibig Diyos ay Pag-Ibig
Shechtman was cast for his discovery of mad even from his research group.
In 1984, two years after its discovery, Shechtman presented his research at a prestigious journal to publish one. But the manuscript was returned to sender - the publisher had rejected as absurd.
Shechtman long sought support from other crystallographers and eventually convinced them of his work. Only when these Shechtman filed together with the paper in another journal, it was released - and sent shockwaves through the scientific world like a bomb. Ten years later they even changed the definition of what makes a crystal: The old description of "periodic, repeating pattern" was no longer appropriate.
Not only basic research
Hundreds of quasicrystals, researchers around the world since Shechtman made discovery. It is always to metal alloys. Some natural minerals with quasicrystal structure has been found.
Many of them have high thermal insulation properties, have smooth, hard surfaces and could be used for pan coatings, engine components and other applications.
Already on the market for razors and special eye surgical needles made from an extremely tough stainless steel - all based on the discovery of quasicrystals Shechtmann.
On 8 April 1982 Daniel Shechtman painted three big question marks in his lab book in which he recorded his experiments and their results. He had studied the atomic structure of a metal alloy - and there was clearly something not quite right. At his lab table was a crystal in which the atoms were sorted on a regular basis, but in a way that was considered impossible: The material had a five-fold symmetry.
Why do some arrangements of atoms are allowed
Only objects of certain symmetries can be put together without gaps or stacked one above the other: twice, threefold, fourfold and sixfold symmetries are not a problem - five times already. The tiler Tile a bathroom usually with square tiles, he could also take a triangular or hexagonal - but never five-cornered. Because it can no bathroom tiles - there are always gaps remain.
Order to change
Atomic model of quasicrystals. (Source: Ames Laboratory of the U.S. Department of Energy)
Up to Shechtman's discovery was clear: all crystals are composed of identical units, which are arranged without gaps so that they repeat themselves constantly. Therefore applied to crystals for a long time: five times were forbidden symmetries. Such crystals contradicted what was then considered all the laws of nature.
But Shechtman newly produced material had a five-fold symmetry. At his trial it was an entirely new type of solid: so-called quasicrystals. These are crystals that are built on completely different rules. The building blocks of a quasicrystal never be repeated: you are always surrounded by a different pattern. Nevertheless, there is no chaos here. They arrange themselves on a regular basis. Which only becomes visible with mathematics.
Daniel Shechtman research colleagues mocked him when they heard what he thought he had found. His boss told him at first, read the crystallographic basis textbook again carefully. As researchers continue to insist on the correctness of his test results, he even had to leave his research group - were too embarrassed to head the crazy ideas Shechtman.
Diyos ay Pag-Ibig Diyos ay Pag-Ibig
Shechtman was cast for his discovery of mad even from his research group.
In 1984, two years after its discovery, Shechtman presented his research at a prestigious journal to publish one. But the manuscript was returned to sender - the publisher had rejected as absurd.
Shechtman long sought support from other crystallographers and eventually convinced them of his work. Only when these Shechtman filed together with the paper in another journal, it was released - and sent shockwaves through the scientific world like a bomb. Ten years later they even changed the definition of what makes a crystal: The old description of "periodic, repeating pattern" was no longer appropriate.
Not only basic research
Hundreds of quasicrystals, researchers around the world since Shechtman made discovery. It is always to metal alloys. Some natural minerals with quasicrystal structure has been found.
Many of them have high thermal insulation properties, have smooth, hard surfaces and could be used for pan coatings, engine components and other applications.
Already on the market for razors and special eye surgical needles made from an extremely tough stainless steel - all based on the discovery of quasicrystals Shechtmann.
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