Graphene "couffin" tinene or "degraded"

The two-dimensional material family welcomes one small meat. Scientists in the United States recently stated that they have developed a two-dimensional network of tin atoms (Stanene) consisting of graphene's cousin, a tin atom. Theory predicts that this material may be 100% conductive, and researchers hope to confirm its excellent electrical properties as soon as possible. However, it was also pointed out that experiments are needed to further confirm that the new material is indeed tinene.

The emergence of graphene in 2004 sparked widespread interest in two-dimensional materials by scientists. To date, they have developed a variety of two-dimensional materials, including siliconenes, terpenes, etc., which mostly possess excellent electrical conductivity. In theory, tinene is superior.

In 2013, the research team led by Stanford University's Zhang Shouyi (Transliteration) found that tinene, which consists of a single layer of tin atoms, may become the world's first supermaterial capable of achieving 100% conductivity at room temperature, far better than in recent years. The hot graphene.

Zhang Shouyi said that tinene is a topological insulator in which charge carriers (such as electrons) cannot reach the center of the material and can only move freely at the edges. Therefore, impurities in the material cannot block the flow of electrons, the current is not wasted in the form of heat, and the conductivity can reach 100%. This means that tinene is the perfect "highway" for delivering electricity.

According to the report of the British “Nature” website on the 3rd, Zhang Shouyi’s team could not confirm that it was a topological insulator after making tines. He explained that they created this kind of mesh by allowing tin to vaporize in a vacuum, causing the tin atoms to drift onto the support surface made of lanthanum telluride. Although the bismuth telluride surface allows the formation of two-dimensional tinene crystals, it also interacts with the tinene and exhibits properties that are not suitable for topological insulators.

Ralph Klassen, a physicist at the University of Würzburg in Germany, believes that it is not entirely certain that the new material is tinene. According to the theory, two-dimensional tin grids should form a honeycomb structure with buckles. The atoms are alternately bent upwards to form corrugated folds. Zhang Shouyi's team can only see the upward wrinkles of the atoms with a scanning tunneling microscope. However, Zhang Shouyi's team firmly believes that they have made a snap honeycomb structure, partly because the distance between the folds is in line with theoretical predictions.

Klayson said that the direct measurement of the grid structure by X-ray diffraction is needed to confirm that the new material is exactly the other combination of tinene rather than tin. (Reporter Liu Xia)

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