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Graphene, the protagonist of the next revolution in science and technology is it!

2020-05-30

Although graphene has received global attention and the graphene industry seems to be thriving, the industrialization process of graphene has not been satisfactory. At present, the graphene industry is generally in the concept introduction stage and the early stage of industrialization breakthrough, and is moving from the confinement of the laboratory to industrialization. With the increasing maturity of technology, the vigorous promotion of capital markets and government policies, graphene may soon lead the next electronic technology revolution. Because graphene materials are hard, have high light transmittance, and low energy loss, they will be widely used in high-end fields such as semiconductors, sensors, flexible touch screens, wearable devices, and environmental governance in the future.

First, the material is hard. The thickness of graphene is 0.34 nanometers and the specific surface area is about 2630 square meters/g. It is the thinnest material found so far, but its strength is 180 gigapascals (about 100 times that of ordinary steel). ), making it the strongest material known to mankind. Physicists at Columbia University used diamond probes to test the durability of graphene. Before the particles in the sample begin to fragment, graphene can withstand a maximum pressure of about 2.9 nanometers per 100 nanometers. This means that if you use graphene to make a bag, it can hold about two tons of things. Graphene combines the characteristics of lightweight and hard materials and is a potential material for the production of lightweight transportation equipment.
Second, high light transmittance. Graphene absorbs about 2.3% of light, its light transmittance exceeds 97%, is almost completely transparent, and has good flexibility. It is conceivable that if other parts and materials on mobile phones and tablet computers can be modified with graphene, the display screens of electronic products in the future may be truly foldable. US Farrell Technology Co., Ltd. develops and manufactures large-area flexible touch screens, and is the first to enter the large-area graphene flexible touch screen market. IDG Capital, a professional investment fund in the technology industry, becomes one of its shareholders. It can be seen that graphene not only has important development prospects in the field of defense science and technology, but its wide range of applications has also attracted the attention of private enterprises. In addition to Samsung, South Korea`s Samsung announced last year that it had successfully used graphene for touch-screen displays and made transparent and flexible displays using materials such as multilayer graphene that can be used in mobile devices.
Third, low energy loss. Researchers have studied the preparation of graphene by mechanical exfoliation and found that the overlap between the conduction band and the valence band of graphene, and the electrons and holes are all at very high mobility, and the electron transfer rate is only one three percent of the speed of light. , Much higher than its traditional semiconductors and conductors such as silicon and copper. On the one hand, due to the extremely low resistivity of graphene, such high electron mobility makes graphene extremely low in energy loss. [The electrons in graphene seem to have no quality," said Professor Zeng, a professor at the University of Science and Technology of China.
In addition, the permeability of graphene to gases, liquids, etc. is almost "zero". It can be seen that if you paint a ship with graphene, it is like putting on a layer of impermeable armor. These amazing properties have made graphene a well-deserved king of new materials in just a few decades.

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