US developed a new carbon-based semiconductor "graphene oxide"
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Graphene has extremely strong electrical and thermal conductivity, far superior to silicon and other traditional semiconductor materials, and the size of transistors made of silicon is approaching the limit. Scientists believe that nano-scale carbon materials may be "life-saving straw", graphite. The future of olefins is expected to replace silicon as an electronic component material. However, because it is too expensive to be mass-produced, the application of graphene is currently very limited, and the materials related to graphene have heretofore existed only in the form of conductors or insulators. Chen Junhong, a member of the research team and a professor of mechanical engineering, said: "One of the main driving forces in the field of graphene research is to make this material a semiconductor. We have obtained a new material GMO by chemically modifying graphene. GMO The characteristics shown show that it is easier to produce on a larger scale than graphene.†When the team studied a hybrid nanomaterial developed by Chen Junhong, the GMO was unintentionally inserted. At first, their research object was a hybrid nano-material composed of carbon nanotubes (rolled in graphene rolled into a cylindrical shape) and decorated with tin oxide nanoparticles. Chen Junhong used this mixed material to produce high performance. Highly efficient and inexpensive sensor. In order to better understand the performance of this hybrid material, scientists need to find ways to turn graphene into its "cousin" - an oxide graphene oxide (GO) that can be produced on a large scale and cheaply. The GO is composed of graphene stacked in a non-aligned manner. In the experiment, Chen Junhong and physics professor Marija Gardezka heated the GO in a vacuum to remove oxygen. However, the carbon and oxygen atoms in the GO layer are not destroyed but become neatly arranged, becoming an ordered, non-existent semiconductor GMO. Researcher Eric Mattson said: "We think oxygen will leave, leaving multiple layers of graphene, but the result is not so, we are very surprised." Gadadzka said that because GMO is a single layer Form, so it may be licensed for use in products related to surface catalysis. They are exploring their use in lithium-ion battery anodes, and GMO has the potential to improve the performance of lithium-ion anodes. The research team then needs to understand what triggered the reorganization of the material and what environment would undermine the formation of the GMO. Michael Mevina, director of the Surface Research Laboratory at the University of Wisconsin-Milwaukee, said: "Reduction will remove oxygen, but in fact, we get more oxygen, so there is still a lot we need to know." Weiner pointed out that they are currently only producing GMOs on a small scale in the laboratory, and it is not certain what problems will be encountered in the large-scale manufacturing process.