The future has come! The legendary hardest material "carbon alkyne" prototype has been synthesized

According to the British "Daily Mail" reported on April 13, recently, a research team from the University of Vienna showed that scientists first synthesized and mass-produced linear carbene carbon. The hardness of this carbene carbon is called diamond 40. Times, can be used for future technical equipment.
The University of Vienna research team led by Thomas Pichler developed the technology for mass production of carbene carbon. The carbene carbon chain is extremely unstable, and in order to confirm the existence of this carbon chain, the researchers used different types of spectroscopy and x-ray scattering to test. The results show that the carbene carbon chain can not only exist in the above conditions, but also can be stable under the conditions of electrical properties. As a result, the researchers used a double-walled carbon nanotube technology consisting of two layers of graphene, which was continuously lengthened. The previous carbon chain did not exceed 100 carbon atoms, and the extension of the carbene carbon chain reached 6,400. However, the Institute spent 50 times the time. In 1885, Adolf von Baeyer first proposed the concept of linear carbene carbon, when he described this linear acetylene carbon as an infinitely extendable carbon chain, which is the carbene carbon chain we now know. But there is no suitable way to achieve its infinite extension.
Now, scientists have not only developed carbene carbon chains, but their hard properties can also be used in future nanoelectronics and fiber optic equipment. Lei Shi, the first author of this research paper, identified the study of the Carbene carbon chain as “an infinite step in the foreground”, which is “a major goal of exposing the true-faced allotrope of linear carbon”. Leap over." This study provides a powerful practice and theory for solving and controlling the mechanical properties of low-dimensional carbon-based materials. Prior to this, studies on closed geometry for electron correlation and quantum dynamics phase transitions were impossible, but the study of carbene carbon provided a strong experimental basis for this.

Related reading: The legendary hardest material "Carbonyne" prototype has been synthesized, the hardness is 40 times that of diamonds
In the latest issue of Nature Materials, Austrian scientists pointed out that they have synthesized a large number of stable linear carbon chains in the history, which consist of more than 6,000 carbon atoms, or help them to be mass-produced. The hardest substance known to date - carbyne.
In 1885, the German organic chemist Adolf von-Beyer first proposed the concept of carbyne, which he described as an infinitely long carbon-carbon single bond and three-bond alternating carbon chain. But he also warned that it is difficult to manufacture because it is extremely unstable.
Previously, American scientists have pointed out theoretical calculations that the one-dimensional linear band of carbon alkyne should be stronger and stronger than any known material, with great tensile strength and hardness, and the hardness is 40 times that of diamond. It is twice as large as graphene, so it can be used to prepare ultra-sturdy equipment. In addition, it has the unique property of being able to transform from a conductor to an insulator only by 3% stretching, and thus is favored by the field of electronic equipment.
Although scientists can use some methods to stabilize the carbon chain, they have previously been able to produce unstable carbon chains with up to 100 carbon atoms. Now, the Thomas Picheler team at the University of Vienna has mass-produced stable carbon long chains in a new way. Some long chains have more than 6,000 carbon atoms and are considered to be the "products" closest to carbyne in history.
In the latest study, scientists rolled two layers of graphene into a mass to create a double-walled carbon nanotube and synthesized the long carbon chain in the gap of the graphene sheet. The gap protects the material. Let it stay stable. Shi Lei, the first author of the study, said: "The latest research has taken a crucial step towards our ultimate understanding of carbon acetylene."
Although the long chain of acetylene produced this time is longer than before, it is still invisible to the naked eye. The researchers confirmed the existence of this carbon chain by transmission electron microscopy, X-ray diffractometry and near-field resonance Raman spectroscopy. The results show that this carbon chain is very stable in the experimental environment, and its electrical properties depend on the length of the carbon chain. Moreover, because the mechanical and electrical properties of acetylene are different, the future may help scientists to fabricate new nanoelectronic and optomechanical devices.
Scientists say the new findings are a key step in the mass production of acetylene, but further research is needed before the specific application.
Xiaobian circle : The carbon family is very interesting, and the dragon is nine sons, which are different. The hardest diamond and the softest graphite are the elemental allotropes in the natural form of carbon; artificial carbon compounds such as nylon, gasoline, plastics, etc. are more visible in life; the favorite new material graphene Because of the superior performance, it is “pushing the waves before the Yangtze River”; but compared with the theoretical prediction and calculation model, it is proved to be “the hardest” acetylene in the world and its application possibility, it can only be regarded as “older generation”. Of course, it is still a long way to produce a carbon alkyne from a certain length of carbon chain, but it does not affect our eager anticipation for the strongest materials of the future.

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