Graphene: silicon carbide can be obtained by carbonizing at low temperature.
Graphene is a new material of single layer structure made up of carbon atoms. It is the thinnest and most powerful two-dimensional material found so far. Because of its strong hardness, extraordinary conductivity and excellent light transmittance, it is called "the material to change the twenty-first Century". However, due to the high cost of preparation, industrial application of graphene has been reluctant. Recently, the preparation method of graphene made by scientists in Poland has made possible the industrialization of graphene.
Since two British scientists successfully separated the magical nanomaterials of graphene in 2004, the preparation of low - cost, high - quality and large - size graphene has become the key target of the global industry and researchers. The common methods for preparing graphene are physical stripping and chemical deposition. The former is the most important means to obtain high purity graphene in laboratory. The disadvantage is that the size and price of graphene are small and expensive. Although the chemical method can produce large area of graphene, the purity and quality are low.
The latest patented technology of Dr. Wakimish Stubinski, director of the graphene Research Institute, Poland Institute of electronic materials technology, has made a breakthrough in the preparation of graphene. The process of heating the silicon carbide at high temperature and extracting graphene after the evaporation of silicon atoms is the opposite. The new preparation method can add carbon to the silicon carbide at relatively low temperature. The high purity graphene can be obtained without high temperature decomposition of silicon atoms. The preparation time is only 1/10 of the conventional method, and the price can also be reduced to 70 dollars per square centimeter. If the scale production is carried out, the cost will also be greatly reduced, so that the price level of industrial silicon can be achieved. At the same time, the quality of graphene prepared by this method is much higher than before. Dr. Stu Pinsky also won the 2012 outstanding achievement in science and technology in Poland in this year.
According to Dr. Zygmunt Uchinski, director of the Poland Institute of electronic materials technology, graphene is a new star in the family of materials. It has an immense potential for applications in many fields, such as electronics, space, new energy and semiconductors. The excellent conductivity of graphene may replace silicon as a material for making ultra micro transistors, which can make the speed of the computer faster; its lightness and tenacity is the first choice for making ultra light bulletproof vest and ultra light aircraft material. The latest research shows that using nanotechnology can make graphene a DNA sensor to detect the rotation and position structure of the DNA chain, opening a new path for genome sequencing.
In recent years, advances in scientific research on graphene rapidly, its industrial application is imminent. It is predicted that once the production of graphene, will be in the touch screen, energy storage batteries, sensors, semiconductors, aerospace, military, biomedical and other fields, to become the next trillions of industries. The huge market prospect has led the world to develop graphene research and investment boom. According to incomplete statistics, there were 3520 patents applied for graphene research in the world in 2012, but most of them still did not go out of the laboratory. Therefore, whether the new graphene preparation technology will ultimately benefit mankind will ultimately depend on whether it can successfully invest in industrial production.