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What are the applications of graphene?
Time:2017-09-20

Graphene applications from the distribution of graphene patent field, the application of technology research layout hot spots include: graphene for lithium ion battery electrode materials, solar cell electrode materials, thin film transistor preparation, sensors, semiconductor devices, composite materials, transparent Display touch screen, transparent electrode and so on. Mainly concentrated in the following four areas:.

Gravel five major application areas full interpretation

Graphene (Graphene), also known as single-layer ink, is a new type of two-dimensional nano-materials, is found in the hardness of the first high, toughness of the strong nano-materials. Because of its special nano-structure and excellent physical and chemical properties, graphene in electronics, optics, magnetic, biomedical, catalytic, energy storage and sensor applications in the field of broad prospects, is recognized as the 21st century "future materials" and " Revolutionary material ". Graphene-related patents began to show explosive growth (353 in 2010, up to 1829 in 2012). Overall, graphene technology began to enter the rapid growth period, and quickly to the technical maturity of the cross. Global graphene technology research and development layout of the increasingly fierce competition, the technical advantages of countries are gradually formed. Graphene appeared in the lab was in 2004, when two scientists at the University of Manchester, Andre; Jim and Kostya; Novo vanov found that they could get in a very simple way The thinner the graphite sheet. They peeled the graphite sheet from the graphite, and then the two sides of the sheet on a special tape, tearing the tape, you can divide the graphite sheet into two. Constantly so that the operation, so thin and thin, and later, they get only one layer of carbon atoms formed by the sheet, which is graphene. After this, the new method of preparing graphene is endless, and after five years of development, it has been found that the introduction of graphene into industrial production is not far off. As a result, both won the Nobel Prize in Physics in 2010.

Graphene applications

Recently published a report from the Chinese Academy of Sciences pointed out that the research and industrialization of graphene continue to heat up, from the distribution of graphene patent field, the application of technical research layout hot spots include: graphene for lithium-ion battery electrode materials, solar cell electrodes Materials, thin film transistor preparation, sensors, semiconductor devices, composite materials, transparent display touch screen, transparent electrodes.

Mainly in the following four areas:

(A) the field of sensors.

Because of its unique two-dimensional structure in the sensor has a wide range of applications, with a small size, surface area, high sensitivity, fast response time, fast electron transfer, easy to fix the protein and maintain its activity and other characteristics, can enhance the sensor Performance. Mainly used for gas, biological small molecules, enzymes and DNA electrochemical sensor production. Singapore Nanyang Technological University has developed a sensitivity of 1,000 times the ordinary sensor graphene light sensor; the United States Rensselaer Institute of Technology developed far more than the existing commercial gas sensor cheap graphene sponge sensor.

(2) energy storage and new display areas.

Graphene has excellent electrical conductivity and light transmission, as a transparent conductive electrode material, in the touch screen, liquid crystal display, energy storage batteries, etc. have a good application. Graphene is considered to be the potential of touch screen manufacturing instead of indium tin oxide materials, Samsung, Sony, Hui Rui, 3M, Toray, Toshiba and other leading enterprises are in this area made a key R & D layout. Researchers at the University of Texas at Austin use KOH to chemically modify the graphene to form a porous structure, and the resulting supercapacitor's energy density is close to that of lead-acid batteries. Scientists at the University of Michigan have developed a unique honeycomb-shaped three-dimensional graphene electrode with a photoelectric conversion efficiency of 7.8% and are inexpensive and are expected to replace platinum in solar cells. Toshiba developed a graphene and silver nanowire composite transparent electrode, and to achieve a large area.

(C) the field of semiconductor materials.

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Graphene is considered an ideal material for alternative silicon, a large number of powerful enterprises have carried out the development of graphene semiconductor devices. Korea Sungkyunkwan University has developed a high stability of n-type graphene semiconductors, can be used for a long time exposed to the air. University of Columbia developed a graphene-silicon photoelectric hybrid chip, in the field of optical interconnect and low power photonic integrated circuit has a wide range of applications. IBM researchers have developed a graphene field-effect transistor with cut-off frequencies up to 100 GHz and frequency performance far beyond the cut-off frequency (40 GHz) of the advanced silicon transistors of the same gate length. (4) biomedical field. Graphene and its derivatives in the nano-drug transport system, biological detection, biological imaging, cancer treatment and other aspects of the application is broad. Biomaterials or biosensors based on graphene can be used for bacterial analysis, DNA and protein detection. Such as the University of Pennsylvania developed by the graphene nano-hole equipment can quickly complete the DNA sequencing. The graphene quantum dots are used in biomimetic imaging to have more stable fluorescence than the phosphor, without light bleaching and no light. Although the application of graphene in the field of biomedical research in the initial stage, but it is particularly broad prospects for the industrialization of one of the areas.