Here is a brief introduction from my seminar about the new progress of graphene and its derivates:
Recently, great interests have been ignited on transport in novel 2D nanostructures for the remarkable electronic properties. 2D nanostructures can fit the approximation of 2D electron gas and different kinds of theory based on the approximation in condensed matter physics very well. As the most rising star, Graphene, a single layer of graphite is different from the conventional 2D nanostructure due to the linear energy dispersion relation near the charge neutrality (Dirac) point in the electronic band structure (the touch between CB and VB) which refers the extra-high mobilities. It is even reported the massless electrons in the transport through graphene. From the present researches, it is also responsible for quantum Hall effect and other extraordinary properties. As a result, graphene is applied on functional devices such as logic circuits, transistors, memories and sensors.
Recently, great interests have been ignited on transport in novel 2D nanostructures for the remarkable electronic properties. 2D nanostructures can fit the approximation of 2D electron gas and different kinds of theory based on the approximation in condensed matter physics very well. As the most rising star, Graphene, a single layer of graphite is different from the conventional 2D nanostructure due to the linear energy dispersion relation near the charge neutrality (Dirac) point in the electronic band structure (the touch between CB and VB) which refers the extra-high mobilities. It is even reported the massless electrons in the transport through graphene. From the present researches, it is also responsible for quantum Hall effect and other extraordinary properties. As a result, graphene is applied on functional devices such as logic circuits, transistors, memories and sensors.
The orientation of graphene sheet between electrodes is one of the elements in the investigations on charge transport which is the same as carbon nanotubes. As an alternative, graphene nanoribbon can realize the major function of graphene sheet. The description of electrons in it is revised from 2D electron gas as well while it has the symmetry of 1D systems, so it has the unique properties such as the half-metallic phenomenon. However, the properties of graphene ribbons depend on the orientation extremely which are proved both theoretically and experimentally. Therefore, it is important to investigate the effect of orientation in graphene and its derivates for the further application in nanoelectronics.
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