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    Basic Research on Graphene

    Time:2023.11.01Browse:1

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    Graphene is a type of ² A new material in which hybrid connected carbon atoms are tightly packed into a single-layer two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro/nano processing, energy, biomedical, and drug delivery. It is considered a revolutionary material in the future. Andre Geim and Konstantin Novoselov, physicists from the University of Manchester, UK, successfully separated graphene from graphite by micromechanical stripping method, so they jointly won the 2010 Nobel Prize in Physics. The common methods for producing graphene powder are mechanical stripping, redox, SiC epitaxial growth, and the film production method is chemical vapor deposition (CVD).




    Graphene has special significance for fundamental research in physics, as it enables some quantum effects that could only be theoretically demonstrated to be experimentally verified. In two-dimensional graphene, the mass of electrons seems to be non-existent, making graphene a rare condensed matter that can be used to study relativistic quantum mechanics - because massless particles must move at the speed of light, Therefore, relativistic quantum mechanics must be used to describe it, which provides theoretical physicists with a new research direction: some experiments that were originally required to be conducted in giant particle accelerators can be carried out in small laboratories using graphene.




    Semiconductors with zero energy gaps are mainly monolayer graphene, which seriously affects the role of gas molecules on their surfaces. The enhanced surface reactivity of single-layer graphene compared to bulk graphene is demonstrated by the hydrogenation and oxidation reaction results of graphene, indicating that the electronic structure of graphene can adjust its surface activity. In addition, the electronic structure of graphene can be induced by gas molecule adsorption to undergo corresponding changes, which not only changes the concentration of charge carriers, but also doping different graphene.

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