Bitcoin of graphene

1.

Graphene, graphene, is the underlying technology architecture of blockchain created by EOS founder Daniel Larimer and cryptonomex team. Based on this architecture, Daniel has developed bitshares, stem, EOS and other far-reaching projects. The famous blockchain projects developed based on this architecture include Zoomlion auto chain, gongxinbao, karma, payger, echo, seer and so on

Zac chain is an electric vehicle intelligent ecosystem based on blockchain technology. Supported by the core technology of blockchain, supplemented by AI, big data, Internet of things and other technologies, and based on the vehicle traveling data recorder tntelligent tree as the carrier, it customizes an intelligent experience service system for electric vehicle users, covering both the front market and the back market. In the Zac chain network, users can fully control their own driving data, and enter the mining mode from the blockchain technology. Driving is mining, and driving is value. The Zac token generated by mining can be exchanged in the Zac chain ecosystem to solve the pain point of depreciation of users' car use

2. Yes, get ready for the bullet, and the bull market is ready to start. The current price of bitcoin is US $5327
Zhao Dong, a Chinese billionaire and leader of bitcoin, predicts that the long-awaited price rise cycle of bitcoin (BTC) has not yet come, which is contrary to what many encryption analysts and enthusiasts think

on Thursday, April 12, he released the price forecast of bitcoin on his micro blog. According to the report of 8btc, the Chinese cryptocurrency news website, Zhao predicted that the bitcoin bull market would start later this year.

3. No, I didn't hear that musk invested in graphene, but he bought bitcoin, and it will be true. It's probably someone else who cheated you. Take musk as a gimmick and be careful not to be cheated.

4. At present, graphene has not been proced and used in large quantities, and it still exists in the experimental stage. If you can shape and proce graphene and ensure its quality, I think it is very profitable.

5.

The theoretical Young's molus of graphene is 1.0tpa, while the rubber in daily life is only a few thousand MPa. Young's molus is a measure of strength

The theoretical Young's molus of graphene is 1.0tpa, and its inherent tensile strength is 130gpa. The reced graphene modified by hydrogen plasma also has very good strength, and the average molus can be 0.25 TPA higher. Graphene paper made of graphene sheet has many holes, so it is very brittle. However, graphene paper made of functional graphene after oxidation will be very strong

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main applications of graphene

(1) hydrogen storage material

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

(2) Aerospace

e to its high conctivity, high strength, ultra thin and other characteristics, graphene has outstanding application advantages in the field of aerospace and military instry. In 2014, NASA developed a graphene sensor for aerospace applications, which can detect trace elements in the earth's upper atmosphere and structural defects on spacecraft. Graphene will also play a more important role in potential applications such as ultra light aircraft materials

(3) photosensitive element

a new type of photosensitive element made of graphene is expected to increase the photosensitive ability by thousands of times compared with the existing CMOS or CCD through special structure, and the energy consumption is only 10%. It can be used in the field of monitor and satellite imaging, camera, smart phone, etc

6.

The softest graphite refers to the macroscopic appearance. Because the graphite layer is maintained by van der Waals force, the lower layer and the layer are easy to slide relative to each other under the action of external force, giving the impression of "soft". However, in the direction perpendicular to the plane, the graphite is also surprisingly hard, and can even damage diamond tools. Graphene is exfoliated into a single layer of graphite, and its hardness does not change

C60 is fullerene, fullerene has unusual properties, and its representative members such as C60 are known as "nano Prince". The hardness of fullerene is higher than that of diamond, and its toughness is 100 times that of steel

graphene is one of the highest strength materials known. It also has good toughness and can be bent. The theoretical Young's molus of graphene is 1.0tpa, and its inherent tensile strength is 130gpa. The reced graphene modified by hydrogen plasma also has very good strength, and the average molus can be 0.25 TPA higher

the graphene paper composed of graphene sheet has many holes, so the graphene paper is very brittle. However, the graphene paper made of functional graphene after oxidation will be very strong

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other properties of graphene:

1. Mechanical properties:

graphene is one of the highest strength materials known, and it also has good toughness and can be bent. The theoretical Young's molus of graphene is 1.0tpa, and its inherent tensile strength is 130gpa

The reced graphene modified by hydrogen plasma also has very good strength, and the average molus can be 0.25 TPA higher. Graphene paper made of graphene sheet has many holes, so it is very brittle. However, graphene paper made of functional graphene after oxidation will be very strong

Electron effect:

the carrier mobility of graphene is about 15000 cm2 / (V · s) at room temperature, which is 10 times higher than that of silicon, and more than twice that of InSb. Under certain conditions, such as low temperature, the carrier mobility of graphene can even reach 250000 cm2 / (V · s)

Different from many materials, the electron mobility of graphene is less affected by the temperature change, and the electron mobility of single-layer graphene is about 15000 cm2 / (V · s) at any temperature between 50 and 500 K

In addition, the half integer quantum Hall effect of electron carrier and hole carrier in graphene can be observed by changing the chemical potential through the action of electric field, and scientists have observed the quantum Hall effect of graphene at room temperature

The carriers in

graphene follow a special quantum tunneling effect and will not proce back scattering when they encounter impurities, which is the reason for the local super conctivity and high carrier mobility of graphene. The electrons and photons in graphene have no rest mass, and their velocity is a constant independent of kinetic energy

graphene is a zero distance semiconctor because its conction and valence bands meet at Dirac point. At the six positions of Dirac point, Brillouin at the edge of momentum space is divided into two groups of equivalent triples. In contrast, the main points of traditional semiconctors are Γ， Momentum is zero

source: Internet - graphene

7.

The main uses of graphene are as follows:

1, sensors

graphene is an ideal material for electrochemical biosensors, which can be made into chemical sensors by using its surface adsorption properties. The sensor made of graphene has good sensitivity in the detection of dopamine and glucose in medicine

2. Transistor

can be made with high stability of graphene structure

3, new energy battery

the super battery made of graphene solves the problems of insufficient capacity and long charging time of new energy vehicle battery, and greatly accelerates the development of new energy battery instry

4, seawater desalination

the size of capillary channel in graphene film can be compressed by mechanical means, and the pore size can be controlled to filter salt in seawater efficiently

5, composites

multifunctional polymer composites made of graphene and high strength porous ceramic materials enhance many special properties of the composites

common preparation methods of graphene:

1. Oxidation rection method

by using sulfuric acid, nitric acid and other chemical reagents and in the environment of potassium permanganate, hydrogen peroxide and other oxidants, the natural graphite was oxidized to increase the space between the graphite layers, and the oxide was inserted between the graphite layers to prepare graphite oxide. Then the graphite oxide was washed with water, and the washed solid was dried at low temperature to prepare graphite oxide powder

Then, the physical exfoliation and high temperature expansion were used to exfoliate the graphite oxide powder to prepare graphene oxide. Finally, graphene oxide was reced by chemical method to get graphene

2, mechanical stripping method

using the friction and relative motion between objects and graphene, graphene thin layer materials can be obtained. The operation of this method is simple, and the obtained graphene usually maintains its complete crystal structure

refer to: network graphene