Question 1: What is graphene used for? Graphene has always been considered a hypothetical structure that cannot exist stably alone. Until 2004, physicists Andre Heim and Kang Stantin Novoselov successfully separated graphene from graphite in the experiment, thereby proving that it can exist alone. The two also won the 2010 Award for "Pioneering Experiments on Two-Dimensional Graphene Materials" Nobel Prize in Physics.
Graphene is known as "black gold". Data show that graphene is the thinnest known material. It is only 0.34 nanometers thick and invisible to the naked eye. The diameter of a hair is approximately The thickness of 100,000 layers of graphene. The special structural form makes it the hardest and thinnest in the world, and it also has strong toughness, electrical conductivity and thermal conductivity. It is an ideal alternative material and is considered to be used in semiconductors, photovoltaics, and lithium. Material revolution has been brought about in a large number of fields such as batteries, aerospace, military industry, LED, and touch screens.
Question 2: What is the use of graphene? Graphene is currently a popular material, and its uses are also determined by its characteristics. First of all, graphene is not only the thinnest among known materials, it is also very It is strong and hard; secondly, as a simple substance, it can transfer electrons faster than any known conductor at room temperature.
Application prospects can be used as space elevator cables. According to scientists, graphite raw materials are easy to find on the earth, and graphene is the strongest substance known to mankind. It will have many fascinating properties. development prospects. It can not only develop and manufacture paper-thin ultra-light aircraft materials, but also create super-tough body armor, and even open the door to Alibaba for the manufacturing of space elevator cables. American researchers say that one of the biggest obstacles to the space elevator is how to create a 23,000-mile-long cable that is strong enough to connect from the ground to a space satellite. American scientists have confirmed that graphene, the strongest material on earth, Perfect for making space elevator cables! The cost for humans to enter space through a space elevator will be much cheaper than going into space through a rocket. In order to encourage scientists to invent tough materials for making space elevator cables, NASA has previously issued a reward of US$4 million.
Producing supercomputers instead of silicon
Scientists have discovered that graphene is also the material with the best electrical conductivity currently known. This property of graphene is particularly suitable for high-frequency circuits. High-frequency circuits are the leader of the modern electronics industry. Some electronic devices, such as mobile phones, are required to use higher and higher frequencies as engineers are trying to cram more and more information into the signal. However, the working of mobile phones The higher the frequency, the higher the heat. Therefore, the improvement of high frequency is greatly limited. Due to the emergence of graphene, the development prospects of high-frequency enhancement seem to be infinitely broad. This also gives it great application potential in the field of microelectronics. Researchers even see graphene as an alternative to silicon for future supercomputers.
Photonic Sensors
Graphene can also appear on the larger market as photonic sensors, which are used to detect information carried in optical fibers. Now, this The role is still played by silicon, but the era of silicon seems to be coming to an end. In October last year, an IBM research team disclosed for the first time the graphene photodetector they developed. What people are looking forward to next are graphene-based solar cells and liquid crystal displays. Because graphene is transparent, electrical panels made with it have better light transmittance than other materials.
Other applications
Graphene can also be used in transistors, touch screens, gene sequencing and other fields. It is also expected to help physicists make new breakthroughs in the field of quantum physics research. Chinese researchers have discovered that bacterial cells cannot grow on graphene, but human cells are not damaged. Using this, 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 electrodes of lamps, making them Easier to recycle. This material can not only be used to develop paper-thin ultra-light aircraft materials and create super-tough body armor, it can even make the 23,000-mile-long space elevator that scientists dream of a reality.
Graphene-Characteristics
Electron Transport
Schematic diagram of graphene structure Before the discovery of graphene, most (if not all) physicists believed that, Thermodynamic fluctuations do not allow any two-dimensional crystal to exist at finite temperatures. Therefore, its discovery immediately shocked the condensed matter physics community. Although both theoretical and experimental circles believe that a perfect two-dimensional structure cannot exist stably at non-absolute zero, single-layer graphene has been prepared experimentally. These may be down to microscopic distortions of graphene at the nanoscale.
Graphene also exhibits unusual integer quantum Hall behavior. Its Hall conductance = 2e2/h, 6e2/h, 10e2/h... is an odd multiple of the quantum conductance and can be observed at room temperature. This behavior has been explained by scientists as "electrons in graphene obey relativistic quantum mechanics and have no rest mass."
Electrical conductivity
The structure of graphene is very stable. So far, researchers have not found any missing carbon atoms in graphene. The connections between the carbon atoms in graphene are very flexible. When external mechanical force is applied, the carbon atoms face...>>
Question 3: What is the use of graphene? Does graphene have many uses? As the thinnest, strongest, and most electrically and thermally conductive new nanomaterial discovered so far, graphene is called "black gold" and is the "king of new materials." Scientists even predict that graphene will "completely change the 21st century."
Question 4: What are the functions and functions of graphene motors? In many electrical appliances, transparent conductive materials need to be used as electrodes. Electronic watches, calculators, televisions, LCD monitors, touch screens, solar panels and many other devices cannot be separated from the existence of transparent electrodes. Traditional transparent electrodes use indium tin oxide (ITO). Due to the high price and limited supply of indium, this material is relatively brittle and lacks flexibility, and requires vacuum intermediate deposition during the electrode production process. The cost is relatively high, and scientists have been working on finding its replacement for a long time. In addition to requirements such as transparency, good conductivity, and easy preparation, if the material itself is flexible, it will be suitable for use in "electronic paper" or other foldable display devices, so flexibility is also a very important aspect. Graphene is just such a material and is very suitable for making transparent electrodes.
As an emerging material with unique properties, research on the application of graphene is endless. It is difficult for us to list them all here. In the future, field effect tubes made of graphene, molecular switches made of graphene, and molecular detectors made of graphene may appear in daily life... Graphene that gradually comes out of the laboratory will definitely play a large role in daily life. Shine.
We can expect that a large number of electronic products using graphene will appear in the near future. Think about it, how interesting it would be if the smartphones and netbooks in our hands could be rolled up and clipped to our ears, stuffed in our pockets, or wrapped around our wrists when not in use!
Pingdingshan Xinruida Graphite Manufacturing Co., Ltd. will give you the answer.
Question 5: What is the function of graphene clothes? It has the functions of super low-temperature far-infrared, antibacterial and bacteriostatic, skin-friendly and breathable, anti-ultraviolet and antistatic. It can play a role in human health and comfort. .
Hard needs: keeping out the cold
Graphene has good thermal conductivity. Chen Lijun, founder and CEO of Aika, told 36Kr that because graphene’s electrothermal conversion efficiency can reach 99%, It has absolute advantages compared with other hair materials; secondly, traditional resistance wire generates heat, which is prone to short-circuit and fire, unsafe power connection when exposed to water, and low human comfort. Chen Lijun also said that only special groups of people will have demand for wearable devices, so the smart clothing entry point "heat" developed by the company will be suitable for the elderly, outdoor sports personnel, special types of work, special military units, etc.
Aika Technology embeds graphene into the fiber structure, and the cloth woven by twisted threads can support 3.7V safety voltage, and the heating speed and temperature can be controlled through the APP according to the situation. In terms of user experience, safety and comfort are improved.
In addition to its fast heating speed, it is better than carbon fiber and resistance wire in terms of heating uniformity and heating efficiency. As a graphene textile, it is even better because it is soft, not afraid of folding, and washable.
The price will not be high
Although the price of graphene dropped sharply in 2015, it is still a luxury product compared to other textile raw materials. If it is widely used in clothes, the cost This is something that must be considered.
Chen Lijun said that after research and development by Aika Technology, 1 gram of graphene can be woven into 2,630 square meters of fabric, so the cost is negligible when spread out evenly.
Process technology: safety + intelligence
Aika Technology has cooperated with the Graphene Research Institute of the University of Manchester, Changzhou Advanced Materials Research Institute of Beijing University of Chemical Technology, and New Materials and Industrial Technology Beijing Cooperating with top institutions such as research institutes, we have obtained more than ten patents.
At the end of 2015, a "graphene smart shawl" with heating function independently developed by Aika Aika was launched on JD.com for crowdfunding. It ended up with an amount of 5.19 million, and nearly 6,000 people participated in the event. This shawl uses graphene as the heating carrier, controls the temperature through the APP, and is powered by a 5V safe voltage. It is easy to use, safe and controllable.
Question 6: What is the function of graphene and what are its uses? relative! Graphene is essentially a transparent and good conductor, and is also suitable for making transparent touch screens, light panels, and even solar cells.
Question 7: The role of graphene. Uses of graphene: 1. Manufacturing the next generation of supercomputers. Graphene is the material with the best electrical conductivity currently known. This property is particularly suitable for high-frequency circuits. Graphene will be a substitute for silicon and can be used to produce future supercomputers, making computers run faster and consume less energy. . 2. Make cables for the "space elevator". Scientists imagine that in the future, space satellites will be connected to the ground with cables, and then the satellites will become wired kites. Now scientists have finally found a special material that can make such space cables, which is graphene. 3. Can be used as liquid crystal display material. Graphene is a "transparent" conductor that can be used to replace current liquid crystal display materials and be used to produce displays for next-generation computers, TVs, and mobile phones. 4. Manufacturing a new generation of solar cells. Graphene transparent conductive film is highly transparent to all infrared rays, including mid- and far-infrared rays, and is the most ideal material for a new generation of solar cells with very high conversion efficiency. 5. Manufacturing photonic sensors. In October last year, an IBM research team demonstrated for the first time the graphene photodetector they developed. 6. Manufacturing medical disinfectants and food packaging. Chinese researchers have discovered that bacterial cells cannot grow on graphene, but human cells are not damaged. This property of graphene can be used to make bandages, food packaging, antibacterial clothing, bedding, etc. 7. Create “new super-strong materials”. The composite of graphene and plastic can rely on toughness to be ultra-thin, ultra-soft and ultra-light. It is a next-generation new plastic. 8. Graphene is suitable for making transparent touch screens and light-transmitting panels. 9. Manufacturing transistor integrated circuits. Graphene can replace silicon as the basic material for next-generation ultra-high-frequency transistors and is widely used in high-performance integrated circuits and new nanoelectronic devices. 10. Create paper-thin ultra-light aircraft materials and super-tough body armor with 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, which are similar to human life light waves. I use a graphene neck pillow. It is a U-shaped neck pillow in the graphene era. It is a must-have artifact for driving and sleeping. It can relieve neck and joint pain. , disc herniation, bone hyperplasia, etc. I think you can buy and use them.
Question 9: What is graphene? What does it do? Graphene is a honeycomb planar film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with only one atomic layer thickness, so it is also called single-atomic layer graphite. Physicists Andre Geim and Konstantin Novoselov of the University of Manchester in the UK successfully separated graphene from graphite using a micromechanical exfoliation method, and therefore both won the 2010 Nobel Prize in Physics. .
Common graphene powder production methods are mechanical exfoliation, redox, and SiC epitaxial growth, and film production methods are chemical vapor deposition (CVD). Due to its very good strength, flexibility, electrical conductivity, thermal conductivity, and optical properties, it has made great progress in physics, materials science, electronic information, computers, aerospace and other fields. [1]
As a new type of nanomaterial with the thinnest, strongest and strongest electrical and thermal conductivity discovered so far, graphene is called "black gold" and the "king of new materials", scientists say It is even predicted that graphene will "completely change the 21st century." It is very likely to set off a disruptive new technology and new industrial revolution sweeping the world.