A layer of two thick atoms in the sandwich’s molybdenum disulfide of two layers
The Luojun has
Metal sheets are just two atoms thicknesses that can be created by melting large pressures between the two sapphies. Investigators who have developed the process can have unusual materials in chemistry, optics and computers.
Last year, scientists created a gold sheet A single atom thickThey doubled “goldene” after gefenematerial made by single carbon atom. Such materials have been described as two dimensions, as they are chemically as thin.
But making another 2D metal is not possible so far. New, developed technique The Luojun has Science in the Chinese Academy and his colleagues can create 2D sheet Bismuth, gossivenessAs thin as indian, tin and lead to their atomic bonds.
To tighten metal, researchers used very flat sapphire crystals with a thin layer of molybdenum disulfide (Mos2) Like a jaw of a life. Metal dusts were placed among these jaws until they were heated up to 400 ºC until they formed a drop, and then crushed in a huge pressure in 200 megapas. The metal was compressed until the thick atom was thick, or, in the case of Bismuth, only two cool. When the pressure was removed, 2D metal was a sandwich between Mos2 the sheets, then those who were far from sapphires.
Du’s says the process thought eight years ago, but he only led the fruit only when he found the team2 The layers kept thin metal sheets stable. “The only layer of free metal metal atoms is unstable from a thermodynamic point of view. Therefore, we (we needed) have developed a completely new technique,” he says. “The process looks easy, but it works.”
In addition to making very thin layers of atoms, researchers were able to tighten pressure and adjust the metal plates and three atoms accurately thickness.
2D metals can have unusual properties that help scientists analyze macroscopic and superconductivity phenomena.
Mos is a topic2 Encapsulation of metal sheet cannot be easily removed. According to Du, he says it may be a problem for some applications, but experiments do not cause electrical conductivity, so they will not prevent 2D metal that do not prevent them from using electronic devices.
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