Graphene, as a miracle material, is known as the future of electronic products. But now one of its relatives, black phosphorus, has a low-cost manufacturing process, which is expected to replace graphene and become the next new material gold mine.
Graphene, as a miracle material, is known as the future of electronic products. But now one of its relatives, black phosphorus, has a low-cost manufacturing process, which is expected to replace graphene and become the next new material gold mine.
As the fifteenth element in the periodic table, phosphorus compounds usually have chemiluminescence properties, or produce most of the athermal light through chemical reactions.
Black phosphorus, which has been difficult to prepare, has a good application prospect in the field of nano-electronics, which is very similar to graphene, a two-dimensional (one atom thick) magical material. Like graphene, the preparation of black phosphorus has insurmountable difficulties, and it has a multi-layer structure. In order to obtain the required two-dimensional lamellae, these multilayers need to be separated layer by layer through peeling process.
According to foreign media reports, material scientists at Trinity College in Dublin have successfully solved this problem recently. They found that soaking black phosphorus in the solution and then bombing it with sound waves can achieve the same effect, instead of peeling it off layer by layer. The whole process is easier and cheaper. Results: the layered structure was loosely separated, and black phosphorus lamellae with only a few atoms thickness were obtained.
So far, the strange world of two-dimensional materials has been dominated by graphene. When graphene is reduced to a certain thickness, its conductivity will reach a limit level, which is stronger than Kevlar (known as the strongest material on the earth), and it is expected to be used as a filter to absorb hydrogen fuel from the air.
At present, there are more than 7,000 application patents of graphene alone, most of which are occupied by technology giants Apple and Sony. Graphene can be said to be new silicon, but it is not the only material with this property.
Black phosphorus has a band gap, while graphene is a so-called zero-gap semiconductor. As an adjustable semiconductor, black phosphorus may have more applications in electronic equipment: transistors, sensors, solar cells, switches, battery electrodes and so on. Some of these applications have been tested and the results are very good. Like graphene, black phosphorus is not easy to produce in large quantities.
The researchers said that although black phosphorus nanosheets have been mass-produced by liquid stripping, there are still problems in this method, mainly because black phosphorus nanosheets are unstable and will react with water or oxygen. It is necessary to peel off nanosheets stably in liquid environment by effective methods to prevent oxidation. Experiments show that N- cyclohexyl -2- pyrrolidone is the solution that researchers are looking for. N- cyclohexyl -2- pyrrolidone has been widely used in the field of electronic manufacturing.
Black phosphorus is indeed black, unlike its allotrope, which can emit light, but its light dispersion effect is really good, even better than graphene. Because of this, it is very suitable for the photoelectric field. Brand-new star material is shining.
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