Graphene is a planar film composed of a carbon atom and a sp2 hybrid orbital to form a hexagonal honeycomb crystal lattice. It is a two-dimensional material with only one atomic layer thickness. As shown in Figure 1.1, the cell of graphene is defined by lattice vectors a1 and a2. There are two atoms in each cell, which are located on the lattices of A and B, respectively. The three electrons in the outer layer of C atom form a strong sigma bond (blue) by sp2 hybridization, and the angle between adjacent two bonds is 120°, and the fourth electron is common, forming a weak Ï€ bond (purple). The carbon-carbon bond length of graphene is about 0.142 nm, and there are three σ bonds in each crystal lattice. The p orbitals of all carbon atoms are perpendicular to the sp2 hybrid plane, and a delocalized Ï€ bond is formed side by side. It runs through the entire graphene. Graphene charging treasure, graphene leggings, graphene engine oil... As a new type of nano material, graphene is quietly entering people's lives, and because of its "black technology" attribute, many people have it Understanding is still stuck in the concept phase. From the first time in 2012, the Ministry of Industry and Information Technology clearly proposed to support the development of new graphene materials. Graphene has gradually moved from basic research and development to industrialization. “Mountaining, exploration, hiking and other outdoor sports battery power is not enough, lack of effective emergency power supply, adding fresh water, sea water, ice and snow to the graphene mobile power supply, can generate electricity.†He Guoqiang, chief scientist of Guangxi University, said that this is graphene-based high energy. Aluminum mobile power project, the technology is mature now, the market prospect is broad, and basically meet the industrial conditions. Graphene is the thinnest, most conductive and thermally conductive new nanomaterial discovered at present. It is called “black gold†and is the “king of new materialsâ€. Graphene has great industrial application value in many fields such as semiconductor, flexible electronics, biomedicine, energy storage, and sensing. The future changes in graphene to people's lives will be immeasurable. The use of graphene in tumor screening and treatment may benefit all humans. "Efficient screening and killing of tumor cells in the early stage is of great significance for overcoming tumor difficulties. Doped graphene quantum dots can be intervened at this stage to provide important cell-level imaging reference." Shanghai Microsystems and Information, Chinese Academy of Sciences Yang Xin, project manager of the Institute of Technology, said. Yang thinks that in the treatment of tumors, a new treatment method combining graphene quantum dots and autophagy suppression technology will be expected to achieve targeted visualization and high-efficiency treatment of tumors. In 2015, the State Council issued "Made in China 2025" to deploy the medium and long-term development route of the graphene industry. After that, the relevant ministries and commissions issued "Several Opinions on Accelerating the Innovation and Development of Graphene Industry", becoming the first program for the development of graphene industry in China. Sex documents. At present, many countries in the world regard graphene as the strategic commanding height of high-tech development and fierce competition in high-end research and development. Liu Zhongfan, a member of the Chinese Academy of Sciences and a professor at the School of Chemistry and Molecular Engineering at Peking University, revealed that as of February this year, 58% of the global graphene patents came from China. In the past few years, more than 40 graphene industrial parks, innovation centers, research institutes and industry alliances have been established across the country. As of February 10 this year, the number of companies involved in the preparation, sales, application, investment, testing and technical services of graphene in the national industrial and commercial registration reached 2,059. At present, China has nearly 50 listed companies related to graphene. Judging from the status quo of domestic industry, China has formed a pattern of active development in the Pearl River Delta, Beijing-Tianjin-Hebei, Sichuan-Chongqing and other places centered on Changzhou, Wuxi and Nanjing in East China. Graphene has initially completed large-scale graphene preparation and graphite. Aene application development. The continuous development of graphene application development will bring about the upgrading effect of traditional technologies and products, enhance the added value and industrial competitiveness of traditional enterprises, and generate huge industrial application value. According to the 2017 Global Graphene Industry Research Report prepared by the China Graphene Industry Technology Innovation Strategic Alliance Industrial Research Center, the global graphene application market will grow to 100 billion yuan in 2020, and China will dominate the global graphene market. status. Liuzhou, Guangxi has a number of well-known domestic and foreign enterprises such as Liugong, Liugang, GAC and SAIC, and has good conditions for integration with the graphene industry. At present, Luzhai County of Liuzhou City has introduced Guangxi Yixin Nano New Material Technology Co., Ltd., Jiangyin Zhongchuang Network Information Co., Ltd. modified graphene EPS products project, Jiangsu Bofan EPP Co., Ltd. and other partners. Although people are generally looking forward to the entry of graphene into production and life, the road to industrialization is still long and rugged. “Graphene is gradually expanding, but the speed is not as fast as imagined, because a new technology can take 5 to 10 years, or even longer, to truly penetrate into our production and life.†Shandong University National Colloidal Materials Engineering Technology Professor Hou Shifeng of the research center said. The industry believes that the concept of graphene mobile phone has been proposed since 2013, and it will take time to really go to market. Overall, the graphene industry is still in the initial stage of development, with low-end products as the mainstay. Many experts said that graphene materials are the cornerstone of the graphene industry, but today's graphene materials are not enough to support the future graphene industry, and it is necessary to continuously improve the quality of graphene materials, but also faces different standards. The market is not standardized. Liu Zhongfan said that the fact that graphene products really "fly into the homes of ordinary people" still takes time, and it is not only solved in three or five years. “On the whole, graphene is still just an 'additive' to the icing on the cake.†He also said that he does not approve of the graphene industrial parks all over the country. It should be combined with local industries and industries to make features. Promising. Middle-low Level Lighting Sky Curtain Middle-Low Level Lighting Sky Curtain,Ultra Transparency Display,Digital Signage Video Display,High Brightness Led Outdoor Lighting Kindwin Technology (H.K.) Limited , https://www.szktlled.com