Graphene is called "black gold". The data show that graphene is the thinnest of known materials, only 0.34 nm thick, which is invisible to the naked eye. The diameter of a hair filament is approximately equal to the thickness of100000 layers of graphene. Because of its special structure, it has the characteristics of being the hardest and thinnest in the world at present, and it also has strong toughness, electrical conductivity and thermal conductivity. It is an ideal substitute material, which is thought to bring material revolution in many fields such as semiconductor, photovoltaic, lithium battery, aerospace, military industry, LED, touch screen and so on.
Question 2: What is the purpose of graphene? Graphene is a popular material at present, and its use is also determined by its characteristics. First of all, graphene is not only the thinnest of known materials, but also very strong and hard; Secondly, as a simple substance, it can transfer electrons faster than known conductors at room temperature.
According to scientists, it is easy to find the raw material of graphite on the earth, and graphene is the strongest substance known to mankind, and it will have many fascinating development prospects. It can not only develop and manufacture ultra-light aircraft materials as thin as paper, but also manufacture ultra-tough body armor, and even open the door to Alibaba for manufacturing space elevator cables. American researchers say that one of the biggest obstacles to a space elevator is how to make a 23,000-mile-long cable strong enough to connect to a space satellite from the ground. American scientists have confirmed that graphene, the strongest substance on earth, is completely suitable for making space elevator cables! It will be much cheaper for humans to go into space by space elevator than by rocket. In order to encourage scientists to invent tough materials for manufacturing space elevator cables, NASA had previously offered a reward of $4 million.
Produce supercomputers instead of silicon
Scientists have found that graphene is still the best conductive material known at present. This characteristic of graphene is especially suitable for high frequency circuits. High-frequency circuit is the leader of modern electronic industry. Some electronic devices, such as mobile phones, are required to use higher and higher frequencies because engineers are trying to fill more and more information into signals. However, the higher the working frequency of mobile phones, the higher the calorific value, so the promotion of high frequency is greatly limited. Due to the appearance of graphene, the development prospect of high frequency enhancement seems infinitely broad. This makes it have great application potential in the field of microelectronics. Researchers even regard graphene as a substitute for silicon and can be used to produce future supercomputers.
photonic sensors
Graphene can also be used as a photon sensor in a larger market to detect the information carried in optical fibers. Now, this role is still played by silicon, but the era of silicon seems to be coming to an end. In June 5438+10 last year, a research group of IBM unveiled their graphene photodetector for the first time. Next, people have to look forward to solar cells and liquid crystal displays based on graphene. Because graphene is transparent, electrodes made of graphene have better light transmittance than other materials.
Other applications
Graphene can also be used in transistors, touch screens, gene sequencing and other fields, which is expected to help physicists make new breakthroughs in the field of quantum physics research. Researchers in China found that bacterial cells could not grow on graphene, while human cells were not damaged. Graphene can be used to make bandages, food packaging and even antibacterial T-shirts. Photoelectrochemical cells made of graphene can replace metal-based organic light-emitting diodes, because graphene can also replace the traditional metal graphite electrode of lamps, which is easier to recycle. This material can not only be used to develop and manufacture ultra-light airplane materials as thin as paper, but also make ultra-tough body armor, and even make the 23,000-mile-long space elevator that scientists dream come true.
Graphene-characteristics
Electronic transportation
Schematic diagram of graphene structure Before the discovery of graphene, most (if not all) physicists thought that thermodynamic fluctuations did not allow any two-dimensional crystal to exist at a finite temperature. Therefore, its discovery immediately shocked the condensed matter physics community. Although both theoretical and experimental circles believe that the perfect two-dimensional structure can not exist stably at non-absolute zero, single-layer graphene was prepared in the experiment. These may be attributed to the microscopic distortion of graphene at the nanometer level.
Graphene also shows abnormal integer quantum Hall behavior. Hall conductance =2e2/h, 6e2/h, 10e2/h ... are odd multiples of quantum conductance and can be observed at room temperature. This behavior is interpreted by scientists as "electrons obey relativistic quantum mechanics in graphene, and there is no rest mass".
electrical conductivity
The structure of graphene is very stable. So far, researchers have not found that graphene lacks any carbon atoms. The connection between carbon atoms in graphene is very flexible. When mechanical external force is applied, the surface of carbon atom ... >; & gt
Question 3: What is the purpose of graphene? Do you have many uses? Graphene has many uses. Graphene, as a new nano-material with the thinnest, strongest strength and strongest electrical and thermal conductivity, is called "black gold" and is the "king of new materials". Scientists even predicted that graphene would "completely change 2 1 century".
Question 4: What are the functions and functions of graphene motor? In many electrical appliances, transparent conductive materials are needed as electrodes. Electronic watches, calculators, televisions, liquid crystal displays, touch screens, solar panels and many other devices are inseparable from the existence of transparent electrodes. The traditional transparent electrode is indium tin oxide (ITO). Because of the high price and limited supply of indium, this material is fragile and inflexible, and the cost is high in the process of making electrodes. Scientists have been trying to find its substitutes for a long time. In addition to transparency, good conductivity and easy preparation, if the material itself is flexible, it will be suitable for making "electronic paper" or other foldable display devices, so flexibility is also a very important aspect. Graphene is such a material, which is very suitable for making transparent electrodes.
As a new material with unique properties, the application research of graphene emerges one after another. It is difficult for us to list them here. In the future, there may be field effect transistors made of graphene, molecular switches made of graphene, and molecular detectors made of graphene in daily life ... Graphene gradually coming out of the laboratory will surely shine in daily life.
We can predict that in the near future, a large number of electronic products using graphene will appear. Think about it, how interesting it would be if our smartphones and netbooks could be rolled up in our ears, stuffed in our pockets or wrapped around our wrists when not in use!
Pingdingshan Xinruida Graphite Manufacturing Co., Ltd. will answer your questions.
Question 5: What is the function of graphene clothes? It has the functions of ultra-low temperature and far infrared, antibacterial, skin-friendly, breathable, anti-ultraviolet and anti-static, and can play a role in health care and comfortable fitness.
Hard demand: keep out the cold
Graphene has good thermal conductivity. Chen Lijun, founder and CEO of Aika Ai Jia, told 36Kr that graphene has absolute advantages over other hair materials because its electrothermal conversion efficiency can reach 99%. Secondly, the traditional resistance wire is hot, which is easy to short-circuit and catch fire, unsafe to connect water and low in human comfort. Chen Lijun also said that only special people will need wearable devices, so the smart clothing "Fever" developed by the company will be suitable for the elderly, outdoor athletes, special jobs and special arms.
Aika Ai Jia technology embeds graphene into fiber structure, twisted cloth can support 3.7V safe voltage, and the heating speed and temperature can be controlled by APP according to the situation. As far as user experience is concerned, the security and comfort are improved. In addition to high heating speed, it is superior to carbon fiber and resistance wire in heating uniformity and heating efficiency. As a graphene textile, it is more elastic, not afraid of folding and washable.
The price will not be very high
Although the price of 20 15 graphene has plummeted, it is still a luxury compared with other textile raw materials. If it is widely used in clothes, the cost must be considered.
Chen Lijun said that 1 g graphene can be woven into 2,630 square meters of cloth through the research and development of Ai Jia technology in Aika, so the cost can be ignored.
Technology: security+intelligence
Aika Ai Jia Science and Technology has cooperated with top institutions such as Graphene Institute of Manchester University, Changzhou Institute of Advanced Materials of beijing university of chemical technology and Beijing Institute of New Materials and Industrial Technology, and obtained more than ten patents.
At the end of 20 15, a "graphene smart shawl" with heating function, which was independently developed by Ai Jia, Aika, landed in JD.COM for crowdfunding, and finally ended with a sum of 5190,000, with nearly 6,000 people participating in the activity. This shawl takes graphene as the heating carrier, controls the temperature through APP, and is powered by 5V safe voltage, which is convenient to use, safe and controllable.
Question 6: What is the function of graphene and what is its use? Honey! Graphene is essentially a transparent good conductor, and it is also suitable for manufacturing transparent touch screens, optical panels and even solar cells.
Question 7: Graphene Graphene's functional use: 1, manufacturing the next generation supercomputer. Graphene is the best conductive material known at present, especially suitable for high frequency circuits. Graphene will become a substitute for silicon and can be used to produce future supercomputers, which will make computers run faster and reduce energy consumption. 2. Make cables for the "space elevator". Scientists fantasize that in the future, space satellites will be connected to the ground through cables. At that time, satellites will become wired kites. Now scientists have finally found a special material that can make this kind of space cable. This is graphene. 3. It can be used as a liquid crystal display material. Graphene is a "transparent" conductor, which can be used to replace the current liquid crystal display materials and to make the display screens of the next generation computers, televisions and mobile phones. 4. Manufacture a new generation of solar cells. Graphene transparent conductive film has high transparency to all infrared rays, including middle and far infrared rays, and is the most ideal material for a new generation of solar cells with high conversion efficiency. 5. Manufacture photon sensors. Last year, in June+10, 5438, a research group of IBM demonstrated their graphene photodetector for the first time. 6. Manufacturing medical disinfection products and food packaging. Researchers in China found that bacterial cells could not grow on graphene, while human cells were not damaged. This characteristic of graphene can be used to make bandages, food packaging, antibacterial clothing, bedding and so on. 7. Create "new metamaterials". Graphene is a new type of plastic with the characteristics of ultra-thin, ultra-soft and ultra-light. 8. Graphene is suitable for making transparent touch screens and transparent boards. 9. Manufacturing transistor integrated circuits. Graphene can replace silicon as the basic material of the next generation of UHF transistors, and is widely used in high-performance integrated circuits and new nano-electronic devices. 10, made paper-thin ultra-light aircraft materials, made ultra-tough bulletproof vests, and had military applications.
Question 8: Can graphene generate heat? What other uses are there? It can conduct electricity and heat, and release far-infrared light waves, similar to the light waves of human life. I use a graphene neck pillow, which is a U-shaped neck pillow in the olefin era. It is an essential artifact for driving and sleeping, which can relieve neck joint pain, disc herniation, hyperosteogeny and so on. I think you can buy it.
Question 9: What is graphene? What's the role? Graphene is a honeycomb planar film formed by the hybridization of carbon atoms sp2. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called monoatomic graphite. University of Manchester physicist Andre? Gaim and Constantine? Novoselos, who successfully separated graphene from graphite by micro-mechanical stripping, won the 20 10 Nobel Prize in Physics. The common methods of graphene powder production are mechanical stripping, redox and SiC epitaxial growth, and the method of thin film production is chemical vapor deposition (CVD). Because of its excellent strength, flexibility, electrical conductivity, thermal conductivity and optical characteristics, it has made great progress in physics, material science, electronic information, computer, aerospace and other fields. [ 1]
Graphene, as a new nano-material with the thinnest, strongest strength and strongest electrical and thermal conductivity, is called "black gold" and is the "king of new materials". Scientists even predicted that graphene would "completely change 2 1 century". It is very likely to set off a subversive new technology and new industrial revolution sweeping the world.