A team of researchers at the University of Southampton in the United Kingdom has developed a replacement material for graphene. In addition to its excellent electrical conductivity and excellent hardness as graphene, this material also possesses luminescent properties. Now it has been able to achieve a large area production of more than 1,000 square meters and is expected to become a powerful challenger for graphene. Related papers were published in the latest issue of the "Nanoscale" magazine.
Graphene, a monolayer of carbon atoms, is being used in more and more electronic and mechanical equipment because of its excellent mechanical and electrical properties. It can be seen in devices such as transistors, switches, and light sources.
The Physicist Organization Network reported on September 24 (Beijing time) that the material developed by scientists at the Optoelectronics Research Center at the University of Southampton in the United Kingdom is called molybdenum disulfide. These new ultra-thin metal/sulphide materials, known as transition metal dichalcogenides (TMDCs), have previously been considered promising candidates for graphene replacement. Unlike graphene, TMDCs are also able to emit light and can therefore be used to fabricate photodetectors and light emitting devices. But until recently, the manufacture of TMDCs, including molybdenum disulfide, has been difficult. Because most of the technologies can only produce sheet materials, and the surface is small, usually only a few hundred square microns, it can not achieve large-scale applications.
In the new study, the research team at the University of Southampton in the United Kingdom, through the use of chemical vapor deposition technology, has now been able to produce ultra-thin molybdenum disulfide materials with an area of ​​more than 1,000 square meters and a thickness of only a few atoms.
Dr. Kevin Huang, Ph.D., director of the Institute's Optoelectronics Research Center, who led the research, said that since 2001 they have been studying the CVD process of this chalcogenide material. Compared to materials with only a microscope lens size, the large-area production process of molybdenum disulfide paves the way for large-scale commercialization of related materials in the field of nanoelectronics and optoelectronics. They are currently working with several British companies and universities as well as MIT and Singapore Nanyang Technological University.
Dr. Huang said that the new technology can not only obtain large-area, thin-thick and uniform film materials, but also can transfer these materials to any substrate, greatly increasing the scope of application and potential demand for this material. It is believed that in the near future people It will be possible to use electronic products and equipment made from this new type of material.
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