Graphene is expected to become a new generation of devices in many applications

 The research and application development of graphene continues to heat up, and materials related to graphite and graphene are widely used in battery electrode materials, semiconductor devices, transparent displays, sensors, capacitors, transistors, and so on. In view of the excellent properties of graphene materials and their potential application value, a series of important progress has been made in many disciplines such as chemistry, materials, physics, biology, environment, and energy. Researchers are committed to trying different methods in different fields to prepare high-quality, large-area graphene materials. And by continuously optimizing and improving the graphene preparation process, reducing the cost of graphene preparation so that its excellent material properties can be used more widely, and gradually moving toward industrialization.

China also has unique advantages in graphene research. From a production perspective, graphite, which is a raw material for graphene production, has abundant energy storage and low price in my country. It is precisely seeing the application prospects of graphene that many countries have established graphene-related technology research and development centers to try to commercialize graphene, and then obtain potential application patents in industry, technology, and electronics-related fields. For example, the European Commission regards graphene as the "Future Emerging Flagship Technology Project" and sets up a special R&D plan to allocate 1 billion euros in the next 10 years. The British government has also invested in the establishment of the National Graphene Institute (NGI) in an effort to make this material available from the laboratory to the production line and market in the next few decades.

Graphene is expected to become a new generation of devices in many application fields. In order to explore the broader application fields of graphene, it is necessary to continue to seek more excellent graphene preparation processes for better applications. Although graphene has only been synthesized and confirmed to exist for a short period of more than ten years, it has become a hot spot for scholars this year. Its excellent optical, electrical, mechanical, and thermal properties have prompted researchers to continue to study it. With the continuous development of graphene preparation methods, graphene will be more widely used in various fields in the near future.

The industrialization of graphene is still in its early stages, and some applications are not enough to reflect the various "ideal" properties of graphene. Many researchers in the world are exploring "killer-level" applications. In the future, they will need to face up to testing and certification. Too many challenges, we need to continue to innovate in means and methods.

Graphene overview

Single layer graphene

Single-layer graphene (Graphene): refers to a two-dimensional carbon material composed of a layer of carbon atoms that are periodically and closely packed in a benzene ring structure (that is, a hexagonal honeycomb structure).

Double layer graphene

Bilayer or double-layer graphene: refers to two layers of carbon atoms that are periodically and closely packed with a benzene ring structure (that is, a hexagonal honeycomb structure) in different stacking methods (including AB stacking, AA stacking, etc.) ) A two-dimensional carbon material composed of stacks.

Few layers of graphene

Few-layer: refers to 3-10 layers of benzene ring structure (ie hexagonal honeycomb structure) periodically and closely packed carbon atoms in different stacking methods (including ABC stacking, ABA stacking, etc.) A two-dimensional carbon material composed of stacks.

The single-layer graphene powder has a two-dimensional structure of a new type of carbonaceous material. Graphene powder has excellent electrical, thermal and mechanical properties.

Multilayer Graphene

Multi-layer graphene is also called multi-layer graphene (multi-layer graphene): refers to the benzene ring structure (ie hexagonal honeycomb structure) with a thickness of more than 10 layers and less than 10 nm. Stacking, ABA stacking, etc.) stacking constitutes a two-dimensional carbon material. 

Few layers of graphene applications

With the gradual breakthrough of mass production and large-size issues, the industrial application of graphene is accelerating. Based on existing research results, the first commercial applications may be mobile devices, aerospace, and new energy. Battery field. Graphene is of special significance to the basic research of physics. It can realize some quantum effects that can only be proved theoretically and can be verified by experiments. In two-dimensional graphene, the mass of electrons does not seem to exist. This property makes graphene a rare condensed matter that can be used to study relativistic quantum mechanics-because massless particles must move at the speed of light, they must be described by relativistic quantum mechanics, which provides theoretical physicists with a New research direction: Some experiments that originally needed to be carried out in a giant particle accelerator can be carried out with graphene in a small laboratory. Zero energy gap semiconductors are mainly single-layer graphene, and this electronic structure will seriously affect the role of gas molecules on its surface. The results of graphene hydrogenation and oxidation reactions prove that single-layer graphene has the function of enhanced surface reactivity compared with bulk graphite, indicating that the electronic structure of graphene can adjust its surface activity. In addition, the electronic structure of graphene can be changed correspondingly by inducing the adsorption of gas molecules, not only can change the concentration of carriers, but also can be doped with different graphenes.

1. Sensor

Graphene can be made into chemical sensors. This process is mainly accomplished through the surface adsorption properties of graphene. According to the research of some scholars, the sensitivity of the graphene chemical detector can be compared with the limit of single molecule detection. The unique two-dimensional structure of graphene makes it very sensitive to the surrounding environment. Graphene is an ideal material for electrochemical biosensors. Sensors made of graphene have good sensitivity for detecting dopamine and glucose in medicine.

2. Transistor

Graphene can be used to make transistors. Due to the high stability of the graphene structure, this transistor can still work stably on the scale of a single atom. In contrast, current silicon-based transistors lose stability by about 10 nanometers in scale; the ultra-fast reaction speed of electrons in graphene to external fields allows transistors made with it to reach very high operating frequencies. For example, IBM announced in February 2010 that it would increase the operating frequency of graphene transistors to 100 GHz, which exceeds that of silicon transistors of the same size.

3. Flexible display

At the Consumer Electronics Show, flexible screens have attracted much attention and become the development trend of mobile device displays in the future. The future market of flexible display is broad, and the prospect of graphene as a basic material is also very broad. South Korean researchers have produced for the first time a flexible transparent display composed of multilayer graphene and a glass fiber polyester sheet substrate. Researchers from South Korea's Samsung and Sungkyunkwan University have fabricated a piece of pure graphene the size of a TV on a 63 cm wide flexible transparent glass fiber polyester board. They say this is the largest "bulk" graphene block to date. Subsequently, they used graphene blocks to create a flexible touch screen. The researchers said that in theory,

4. New energy battery

New energy batteries are also an important area of graphene's earliest commercial use. The Massachusetts Institute of Technology in the United States has successfully developed a flexible photovoltaic panel with a graphene nano-coating on the surface, which can greatly reduce the cost of manufacturing transparent and deformable solar cells. This type of battery can be used in small digital devices such as night vision goggles and cameras. In addition, the successful development of graphene super batteries has also solved the problems of insufficient capacity and long charging time for new energy vehicles, greatly accelerating the development of the new energy battery industry. The application of graphene in the new energy battery industry.

5. Desalination of sea water

Graphene filters are used more than other desalination technologies. After the graphene oxide film in the water environment is in close contact with water, a channel with a width of about 0.9 nanometers can be formed, and ions or molecules smaller than this size can pass through quickly. The size of the capillary channels in the graphene film is further compressed by mechanical means, the pore size is controlled, and the salt in the seawater is effectively filtered.

6. Hydrogen storage materials

Graphene has the advantages of light weight, high chemical stability, and high specific surface area, making it the best candidate for hydrogen storage materials.

7. Aerospace

Due to the characteristics of high conductivity, high strength, ultra-light and thin, graphene has outstanding application advantages in the aerospace and military fields. In 2014, NASA developed a graphene sensor used in the aerospace field, which can detect trace elements in the high-altitude atmosphere and structural defects of spacecraft. Graphene will also play a more important role in potential applications such as ultralight aircraft materials.

8. Photosensitive element

The new type of photosensitive element using graphene as the photosensitive element material is expected to increase the sensitivity by thousands of times compared with the existing CMOS or CCD through a special structure, while the energy consumption is only 10% of the original. It can be used in the field of surveillance and satellite imaging, and can be used in cameras, smart phones, etc. arrive

9. Composite materials

Graphene-based composite materials are an important research direction in the field of graphene applications. They have shown excellent performance in the fields of energy storage, liquid crystal devices, electronic devices, biological materials, sensor materials and catalyst carriers, and have broad application prospects. , The research of graphene composite materials mainly focuses on graphene polymer composites and graphene-based inorganic nanocomposites. With the deepening of graphene research, the application of graphene-enhanced materials in bulk metal matrix composites has attracted more and more attention. Multifunctional polymer composite materials made of graphene and high-strength porous ceramic materials enhance many special properties of composite materials.

10. Biology

Graphene is used to accelerate the osteogenic differentiation of human bone marrow mesenchymal stem cells, and it is also used to make biosensors of epitaxial graphene on silicon carbide. At the same time, graphene can be used as a nerve interface electrode without changing or destroying properties such as signal strength or scar tissue formation. Due to its flexibility, biocompatibility and conductivity, graphene electrodes are more stable in vivo than tungsten or silicon electrodes. Graphene oxide is very effective in inhibiting the growth of E. coli without harming human cells.

The price of few layers of graphene

The price of few-layer graphene will vary randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and supply and demand in the few-layer graphene market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for several layers of graphene, please feel free to send an inquiry to get the latest price of few layers of graphene.

Few layer graphene supplier

As a global supplier of few-layer graphene, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.

Graphene Powder Properties
Other Names	Graphene nanopowder, 2D carbon, monolayer graphene,
	bilayer graphene, graphene nanosheets, graphene nanoribbons,
	graphene nanoplatelet
CAS No.	1034343-98-0
Compound Formula	C
Molecular Weight	12.01
Appearance	Black Powder
Melting Point	3652-3697℃
Boiling Point	4200℃
Density	2.267 g/cm3
Solubility in H2O	N/A
Thermal Expansion	N/A