U.S. analysis of graphene using electronic imaging technology

The first time people obtained graphene crystals was in 2004. Graphene is a two-dimensional (single-layer atom) structure with hardness exceeding diamond, strength over steel, and electrical and thermal properties. By understanding the atomic structure and bond coordination of graphene materials, scientists are expected to propose ways to optimize graphene to make it better suited for specific applications. In the newly published Physical Review Letter, a team of scientists from the Oak Ridge National Laboratory and Vanderbilt University said that they used achromatic scanning electron microscopy to analyze the atoms and electrons of silicon impurities in graphene. The structure was studied. Oak Ridge National Laboratory researcher Juan Carlos Adbrob said they used new experimental and computational methods to reveal the bonding characteristics of individual impurities in graphene. For example, they can distinguish whether a non-carbon atom in graphene is a two-dimensional or three-dimensional bond. In fact, since the inference of bond coordination in the 1930s, this is the first time scientists have visualized it. By studying the atomic and electronic structures of graphene and understanding its dopants, scientists can better predict which dopings can improve the properties of materials, and subtly alter the chemical composition of graphene to tailor the suitability for different applications. Graphene material. For example, by adding different elements, graphene can be substituted for platinum catalytic converters in automobiles, and it can also improve the function of electronic devices. Because of its thermal, electrical, and optical transparency, graphene has the potential to replace the internal component materials in everyday electronics. Indium is an element with a very limited storage capacity. It is widely used for displays of electronic products (television, computers, mobile phones, etc.) due to transparent conductivity, and it is expected to replace indium with cheaper and richer graphene.

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