Who discovered twisted bilayer graphene?
(who discovered twisted bilayer graphene)
Graphene is a two-dimensional material consisting of a single layer of carbon atoms arranged in a hexagonal lattice structure, with each carbon atom bonded to four surrounding atoms. It has attracted significant attention for its unique electronic properties and potential applications in electronics, energy storage, and medicine.
The discovery of twisted bilayer graphene was made by two groups of researchers from the University of Science and Technology of China (USTC) and the University of Michigan. The first group, led by Dr. Quan Hongzhi atUSTC, developed an experiment that allowed them to manipulate the graphene layers to create twisted bilayer graphene. They achieved this by heating up a substrate covered with a thin film of graphene, which caused it to break down into smaller pieces. Then, they used a tool called a mechanical exfoliation process to remove these small pieces and rearrange them into twisted layers.
Dr. Chen Zhiqiang, another researcher from the USTC, worked on the next step in the process. He introduced a chemical treatment that changed the surface chemistry of the graphene sheets, making them more compatible with each other and easier to separate into twisted layers. This treatment involved treating the graphene samples with an amino acid-based compound, which created temporary hydrogen bonds between the layers.
Together, the three researchers were able to successfully separate the graphene layers into twisted bilayer graphene and characterized their electrical and thermal properties. The twistedbilayer graphene had exceptional electronic conductivity, with an electron mobility of over 40,000 cm/s, far beyond the expected value for a bulk sample of graphene. It also had high thermal stability and good mechanical strength.
This discovery of twisted bilayer graphene represents a major milestone in the field of materials science and has opened up new possibilities for the development of advanced electronic devices. The unique properties of twistbilayer graphene make it well-suited for use as a novel kind of solar cell, a superconductor, or even a new type of electronic memory. Its potential applications have generated a lot of interest and enthusiasm among scientists and industry leaders alike.
(who discovered twisted bilayer graphene)
In conclusion, the discovery of twisted bilayer graphene by two teams of researchers from USTC and the University of Michigan is a major breakthrough in the field of materials science. This new type of graphene offers exceptional electrical and thermal properties and has the potential to revolutionize various fields such as electronics, energy storage, and medicine. The progress made in this research has paved the way for further studies and developments in this area, and we can expect to see many exciting discoveries in the future.
