What is the difference between graphene and graphene tablets?

substance, it transmits electrons faster than known conductors at room temperature.

Graphene(Graphene) is a new material with a single-layer sheet structure composed of carbon atoms. It is a kind of SP2 by carbon atoms; The hybrid orbit forms a hexagonal planar film with a honeycomb lattice, only a two-dimensional material with a carbon atom thickness. Graphene has always been considered a hypothetical structure and can not be stable alone[ 1] Until 2004, physicist Andelie·haimu and Kangsitanding·nuowoxiaoluofu of the University of Manchester in the United Kingdom successfully isolated graphene from graphite in the experiment, and confirmed that it could exist alone, and the two were also due to "in the two-dimensional graphene material. The groundbreaking experiment was based on the reason, Together won the 2010 Nobel Prize in physics.

Graphene is currently the thinnest but hardest nanomaterials in the world. It is almost completely transparent and absorbs only 2.3 % of light. " The thermal conductivity is as high as 5300W/m · K, which is higher than that of carbon nanotubes and diamonds. Its electron mobility * exceeds 15000cm2 / V · s at room temperature, and is higher than that of carbon nanotubes or Silicon crystals *, and the resistivity is only about 10-6 Ω · cm, Lower than copper or silver, the material with the smallest resistivity in the world[ 1] And ... Because of its extremely low resistivity and extremely fast electron migration, it is expected to be used to develop a thinner, fast-conducting new generation of electronic components or transistors. Since graphene is essentially a transparent and good conductor, it is also suitable for making transparent touch screens, light panels, and even solar cells.

Another feature of graphene is the ability to observe the quantum Hall effect at room temperature.

Graphene's carbon atoms are arranged in the same way as the single atomic layer of graphite. It is a single-layer two-dimensional crystal formed by the arrangement of carbon atoms in the SP2 mixed orbital domain with a honeycomb lattice. Graphene can be thought of as an atom-size net formed by carbon atoms and their Covalent bonds. Graphene is named after the English graphite(graphite) +-ENE(ENE ending). Graphene is considered to be a planar polycyclic aromatic hydrocarbon atomic crystal.

The structure of graphene is very stable, and the carbon-carbon bond is only 1.42? And ... The connection between the carbon atoms inside the graphene is very flexible. When an external force is applied to the graphene, the carbon atom surface will bend and deform, so that the carbon atoms do not have to be rearranged to adapt to the external force to maintain structural stability. This stable lattice structure gives graphene excellent thermal conductivity.

Graphene is the basic unit that constitutes the following carbon allotropes: graphite, charcoal, carbon nanotubes, and fullerenes. The perfect graphene is two-dimensional and it only includes hexagons(isometric hexagons); If there are Pentagons and heptagons, graphene defects will be formed. Twelve pentagonal graphene form fullerenes together.

Graphene can be used as a carbon nanotube in a drum shape; In addition, graphene was also made into a ballistic transistor(Llistictransistor) and attracted the interest of a large number of scientists. In March 2006, Georgia Institute of Technology researchers announced that they had successfully manufactured graphene planar Field-effect transistors and observed quantum interference effects. Based on this result, graphene was developed as a base material. circuit

The advent of graphene has caused a worldwide research boom. It is the thinnest of known materials. The material is very strong and hard. At room temperature, electrons are transmitted faster than known conductors. Graphene's atomic size structure is very special and must be depicted using quantum field theory.

Graphene is a two-dimensional crystal. People's common graphite is formed by stacking layers of planar carbon atoms arranged in a Honeycomb. The interlayer force of graphite is weak and it is easy to peel off each other to form a thin graphite sheet. When the stone ink sheet is stripped into a single layer, the single layer with only one carbon atom thickness is graphene.

First: graphene is by far the most powerful material in the world. It is estimated that if graphene is made into a film(thickness of about 100 nanometers) thicker than a normal food plastic bag, it will be able to withstand about two tons of heavy articles. Pressure without breaking; Second: graphene is the world's best conductive material.

Graphene has a wide range of applications. According to the ultra-thin and high-strength properties of graphene, graphene can be widely used in various fields, such as ultra-light body armor, ultra-thin ultra-light aircraft materials and so on. According to its excellent conductivity, it also has great application potential in the field of Microelectronics. Graphene may become a substitute for Silicon, making Ultra-Miniature transistors that can be used to produce future supercomputers. Higher electron mobility of carbon can enable future computers to achieve higher speeds. In addition, graphene material is also an excellent modifier. In the field of new energy sources such as super capacitors and lithium-ion batteries, due to its high conductivity and high specific surface area, graphene can be used as an aid for electrode materials. In the laboratory was in 2004, At the time, two scientists at the University of Manchester in the United Kingdom, Andelie·jiemu and Kesiteya·nuowoxiaoluofu, discovered that they could use a very simple method to obtain thinner and thinner graphite flakes. They stripped off the graphite, then glued the two sides of the sheet to a special kind of tape, ripped the tape off, and split the graphite piece in two. They kept doing this, so the sheets became thinner and thinner, and finally they got thin sheets made up of only one layer of carbon atoms, which is graphene. Since then, new methods for preparing graphene have emerged. After five years of development, it has been discovered that it is not far from bringing graphene into the field of industrial production. Therefore, the two won the Nobel Prize in physics in 2010.

The appearance of graphene has caused huge waves in the scientific community. It has been discovered that graphene has extraordinary conductivity, strength that exceeds steel by dozens of times, and excellent light permeability. Its appearance is expected to trigger a revolution in modern electronic technology. In graphene, electrons can migrate extremely efficiently, while traditional semiconductors and conductors such as silicon and copper do not perform well. Due to the collision of electrons and atoms, traditional semiconductors and conductors release some energy in the form of heat. At present, average computer chips waste 72 % -81 % of the electricity in this way, and graphene is different. Its electronic energy will not be lost. This gives it an extraordinary quality.

Graphene microtablets

Graphene Nanoplatets refers to ultra-thin graphene layers with more than 10 layers of carbon and a thickness of 5-100 nm. In some documents, also known as Sheets.

Graphene microchips maintain the original planar carbon six-membered ring conjugated crystal structure of graphite, with excellent mechanical strength, electrical conductivity, thermal conductivity, and good lubrication, high temperature resistance and corrosion resistance. Compared to ordinary graphite, the thickness of graphene microtablets is in the nanoscale range, but its radial width can reach several to dozens of microns, with an oversized shape ratio(diameter/thickness ratio).

Application area:

Improve the thermal conductivity and heat dissipation of plastic;

Conductive and antistatic modification of plastics;

Enhance the strength of plastics;

Improve the wear resistance, lubrication performance and corrosion resistance of plastics.

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