The hottest inventory of graphene scientific resea

Take stock of the popular achievements of graphene scientific research and innovation in the instrument industry in 2017

time flies, time flows, and in the blink of an eye, 2017 is far away from us. In the past year, graphene materials have always been hot and will obviously continue to be popular until 2018. Looking back on 2017, graphene has become more and more popular with the development of science and technology in China, and major brand manufacturers have also made every effort to focus on research. Which graphene research and innovation achievements have attracted more attention in 2017? To this end, the eight popular graphene scientific research and innovation achievements in the instrument industry in 2017 were specially reviewed

graphene transformed medical sensor: it can detect brain cancer cells

according to the news, a team of scientists at the University of Illinois in Chicago (UIC) made graphene into a sensor that can distinguish normal astroglial brain cells from astrocytoma cells. Graphene, as a carbon lattice with atomic thickness, can detect some of their properties when contacting with a single cell

the electrons around the carbon atom of graphene form conjugated large π bonds, and the charge can move freely on the surface. When this material is in contact with cells, the cell properties are different, and the charge distribution on the adjacent graphene surface also shows different characteristics. Cancer cells have high metabolic activity, so there are many electrons on their surface, which may replace the electrons on the surface of graphene. This phenomenon is not observed in normal cells. The change of charge distribution on graphene changes the vibrational energy of its carbon atoms, and this change can be detected by Raman spectroscopy. According to the detection results, we can judge whether the cells belong to cancer cells

International Alliance has developed high-precision graphene infrared detector

recently, graphene flagship, an international alliance composed of more than 150 research teams from 23 countries, has developed a new high-precision infrared detector using nano material graphene. According to the team, this new detector can detect the thermal radiation changes at the nanowatt level - equivalent to one thousandth of the energy released when the hand is gently swinging. Graphene has the advantage of open possibilities in high-performance infrared imaging and spectroscopy. Researchers from the University of Cambridge (UK), enberton Co., Ltd. (UK), the Institute of photonic Sciences (ICFO; Spain), Nokia and the University of Ioannina (Greece) working on graphene flagship have developed a graphene based pyroelectric radiation meter with high accuracy for the measurement of small changes in temperature through infrared radiation detection

the work published in nature · communication has proved that the highest reported temperature sensitivity of graphene based non cooled thermal detector can decompose the temperature change into dozens μ K。 Only a few nanometers of IR radiation power is needed to produce such a small temperature change in the isolation device, which is about 1000 times smaller than the IR power delivered to the detector by close hands

graphene infrared detector can detect extremely small changes in thermal radiation

the high sensitivity of the detector is very useful for spectral applications beyond thermal imaging. Using a high-performance graphene based IR detector can provide a strong signal with less incident radiation and isolate different parts of the IR spectrum. This is crucial in safety applications, where different materials (such as explosives) can be distinguished by their characteristic IR absorption or transmission spectra

Dr. Alan colli, chief engineer and co head of research at Emberton, said: "Using a detector with higher sensitivity can limit the large tropics, and still use photons in a very narrow spectral range to form images, and do multispectral infrared imaging. For safety inspection, there is a specific signature, and the material is emitted or absorbed in the narrow band. Therefore, a detector trained in the narrow band is needed, which is looking for explosives, hazardous substances or any classification."

Suzhou Institute of nanotechnology, Chinese Academy of Sciences has developed a high-sensitivity graphene terahertz detector

recently, the Suzhou Institute of nanotechnology and nano bionics, Chinese Academy of Sciences and other scientific research institutions successfully obtained this research achievement. The Suzhou Institute of nanotechnology and nano bionics, Chinese Academy of Sciences, and the Qin Hua team of the Key Laboratory of nano devices and applications, Chinese Academy of Sciences, have successfully obtained a high sensitivity graphene terahertz detector in cooperation with the National Key Laboratory of special integrated circuits of the 13th Research Institute of China Electronics Technology Group Co., Ltd., and the sensitivity has reached the best level of similar graphene detectors, This result was recently published in carbon (116, (2017))

the development of g-fet terahertz detector has been strongly supported by the National Natural Science Foundation Project (No.,,), the nano processing platform, test and analysis platform of Suzhou Institute of nanotechnology, Chinese Academy of Sciences, and the Institute of good flexibility of superconducting electronics, Nanjing University

the research team of Zhejiang University has successfully developed a high thermal conductivity ultra flexible graphene assembly film

recently, the superb team of the Department of polymer of Zhejiang University has developed a high thermal conductivity ultra flexible graphene assembly film. This latest achievement has solved the world-wide problem that macro materials cannot take into account high thermal conductivity and high flexibility, and is expected to obtain important applications in the fields of efficient thermal management, new generation of flexible electronic devices, aerospace and so on. The article was published in advanced materials

it is reported that the superb team creatively put forward the idea of "large micro folds": large graphene has few defects and can achieve high thermal conductivity; Micro wrinkle makes the material have enough strain space when stretching and bending hard or inelastic resins such as HDPE, PP and PVC, which can ensure high flexibility. Researchers also used ultra large pieces of graphene oxide without fragments as raw materials to reduce the edge phonon escape. At the same time, the functional groups on the surface of graphene were removed and the internal holes of graphene were repaired by high temperature heat treatment, and the graphene structure with few defects was obtained. These structural changes were confirmed by Raman, XRD and transmission electron microscopy. The average thermal conductivity of the obtained graphene film is 1900 w/mk, and the highest value is 2053 w/MK

Shenzhen Institute of advanced technology has developed a new low-cost dual carbon potassium ion battery technology

recently, Tang Yongbing, a researcher at the functional film materials research center of the integration Institute of Shenzhen Institute of advanced technology, Chinese Academy of Sciences, and his research team successfully developed a new high-performance, low-cost dual carbon potassium ion battery, The related research achievement a dual carbon battery based on potassium ion electrolyte (k-dcb) has been published in the journal advanced energy materials

the research shows that the true stress s of the new cheap double carbon potassium ion battery is obtained by dividing the instantaneous load of each point on the curve by the corresponding cross-sectional area of the sample, and the true strain ε Is the differential value D of the instantaneous specimen elongation ι And instantaneous sample length ι The integral of the ratio is obtained, that is, the discharge median voltage is as high as 4.5V, and a single button battery can light up two LED lights at the same time. After 100 cycles of battery charging and discharging, the capacity has almost no attenuation, making it meet the requirements of high-voltage devices. Compared with the existing traditional lithium-ion battery technology, this new battery will greatly reduce the production cost, and also has the advantages of environmental friendliness, high safety, relatively high energy density, so it has a wide application prospect in the fields of large-scale renewable clean energy storage, communication backup power supply and so on

experts from the Chinese Academy of sciences have successfully developed graphene "anticorrosive coating"

learned from the Chinese Academy of Sciences that the team of researcher Wang Liping and academician Xue qunji from the Ningbo Institute of materials technology and engineering of the academy have successfully developed a new graphene modified heavy-duty anticorrosive coating with independent intellectual property rights - this layer of graphene "anticorrosive coating" is expected to make steel materials "resist" the invasion of high salt, high humidity and high temperature from the tropical marine environment

Wang Liping told the author that China has a corrosion-resistant coating market of up to 200billion yuan, of which the average annual growth rate of heavy-duty corrosion-resistant coating demand is more than 20%. However, due to the lack of independent intellectual property technology and the lack of corresponding technical standards, 70% of the heavy-duty corrosion-resistant coating Market was previously monopolized by foreign brands. Now the successful development of domestic graphene "anticorrosive coat" is also expected to change the market pattern of heavy-duty anticorrosive coatings monopolized by foreign products

Peking University researchers realize the preparation of meter scale single crystal graphene

recently, with the support of the key special project of quantum regulation and quantum information, researcher liukaihui, academician Yu Dapeng, Academician Wang Enge and their collaborators of Peking University have made important progress in the growth of meter scale single crystal graphene after the first ultra fast growth of graphene single crystal in 2016. The research team transformed the industrial polycrystalline copper foil into single crystal copper foil, and obtained the world's largest single crystal Cu (111) foil. Using epitaxial growth technology and ultrafast growth technology, the world's largest size (5) was successfully prepared in 20 minutes × 50 cm2). The research results provide the necessary scientific basis for the rapid growth of meter scale single crystal graphene, which is different from the aerospace field, and lay the foundation for the industrialized application of graphene single crystal quantum technology

the research results were published in Science Bulletin in August 2017 and were selected as the cover article. Academician Cheng Huiming of Shenyang Institute of metals, Chinese Academy of Sciences published a key recommendation and comment article on Science Bulletin in the same period

in 2017, surprising research results continued to appear in all directions, making people full of expectations for the future of graphene. But in general, the maturity of graphene technology is still relatively low. For the development of graphene, the constraints or difficulties are mainly in material preparation technology, new design concept and two-dimensional manipulation technology. However, scientists are also optimistic that the controllable low-cost preparation technology of graphene has made a breakthrough in the past two years, and it is expected to form the graphene industry in the near future