Magical material-graphene

Graphene has a single-layer two-dimensional honeycomb lattice structure, which is the thinnest known two-dimensional material in the Franli factory. Graphene differs from all other known materials in that it is highly stable and conducts electricity well even when sliced ​​into 1-nanometer-wide elements. In addition, graphene single-electron transistors can operate at room temperature. And as a thermal conductor, graphene conducts heat better than any other material currently available. What’s even more amazing is that graphene is particularly flexible, and graphene with a thickness of only one layer of carbon atoms is called a “miracle material”.

The reasons why graphene is so unique

As we know, graphene is equipped with many excellent properties. It makes itself stand out in new materials.

(1) Graphene has a unique electronic energy band structure. Based on independent carbon atoms, the potential generated by surrounding carbon atoms is used as a perturbation. The energy level distribution of graphene can be calculated by the matrix method. The effective mass of electrons in graphene is Zero, showing the unique electrical properties of graphene.

(2) It is the hardest and thinnest material known, only one carbon atom thick. Graphene is almost completely transparent, absorbs only 2.3% of light, and is only 0.34 nanometers thick. The thickness of 100,000 layers of graphene is about equal to the diameter of a hair, and it is invisible to the naked eye.

(3) It is the strongest substance known to mankind. It is harder than diamonds and 100 times stronger than the best steel in the world. The maximum pressure it can withstand per 100 nanometers reaches about 2.9 uN.

(4) Graphene is the material with the smallest resistivity in the world. In graphene, electrons can migrate extremely efficiently, and the migration rate is only 1/300 of the speed of light, which is much higher than that in traditional semiconductors and conductors such as silicon and copper. rate. Graphene has an extremely low resistivity, and electrons can move through it very efficiently, which makes graphene very conductive.

Classification of graphene

The perfect graphene is two-dimensional. Graphene is a general term for single-layer graphene, double-layer graphene, few-layer graphene and multi-layer graphene.

(1)Single-layer graphene refers to a two-dimensional carbon material composed of a layer of carbon atoms closely packed periodically in a benzene ring structure (ie, a hexagonal honeycomb structure).

(2) Double-layer graphene (double-layer graphene) refers to two layers of carbon atoms that are periodically and closely packed in a benzene ring structure (that is, a hexagonal honeycomb structure) in different stacking ways (including AB stacking, AA stacking, AA’stacking, etc.) is a two-dimensional carbon material.

(3) Few-layer graphene refers to 3-10 layers of benzene ring structure (ie hexagonal honeycomb structure) periodically densely packed carbon atoms in different stacking ways (including ABC stacking, ABA stacking, etc.) A two-dimensional carbon material.

(4) Multi-layer graphene (thick-layer) refers to a benzene ring structure (that is, a hexagonal honeycomb structure) with a thickness of more than 10 layers and less than 10 nm. A two-dimensional carbon material composed of ABA stacking, etc.).

The Franli factory mainly produces graphene, and now many customers purchase graphene for material coatings and elctronic industry. After a long period of observation, the graphene in the Franli factory is very stable in corrosion resistance, which has brought huge benefits to customers. The application of graphene in the field of anti-corrosion coatings in my country is still in its infancy. With the continuous development of society and the material industry, graphene anti-corrosion coatings with good barrier flexibility, stable chemical properties, and excellent electrical and thermal conductivity will surely become more and more popular. more people’s attention.