Physicists do with similar material graphene




An international team of scientists says to have managed to make staneen. Staneen is a two-dimensional layer tin atoms in a honeycomb structure similar to graphene. Being able to make use of the material was predicted two years ago.

The manufacturing seems to be successful, but the scientists report in the journal Nature Materials that it has not yet been able to confirm whether the material two years ago predicted ‘fantastic’ electronic properties, such as conducting electricity without generating waste heat at room temperature . That’s because the material the scientists were on the staneen interacts with the tin atom structure.

Staneen, derived from the Latin word for tin stannum, like other contemporary flat materials like graphene, the topological insulator. The advantage of a topological insulator is that it is inside behaves as an electrical insulator, but at the same time forces the electrons towards the surface or the edges of the material. The idea is that electrons may travel away without resistance, which occurs only at low temperatures in most cases.

The survey of two years ago to staneen, which appeared in the journal Physical Review Letters, pointed out that tin in its flat shape could be used as material to conduct electrons at room temperature without resistance. Calculations showed that even a combination with fluoride, the electrons to one hundred degrees Celsius without resistance must be movable, but that was only theory. The staneen-fluoride combination could provide the new paths as superconductivity were possible at room temperature, including ExtremeTech and the American university Stanford two years ago brought out.

In a background article on the website of Nature questions the German physicist Ralph Claessen whether it is certain that there is actually staneen made. Namely the theory predicts that the two-dimensional structure a ‘nodding’ honeycomb should be, where the atoms are alternately upward and downward, which should provide fluted edges. The latter would not have been visible enough on the images from the scanning tunnel microscope . The researchers let the publication of their article that they have to be sure about the molded material. But, as with graphene, may take years before the material could have applications in practice.


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