Graphene has excellent electrical transport properties, yet it cannot be used to construct transistor devices due to the lack of an energy gap. Theoretically, quasi-one-dimensional graphene nanoribbons and carbon nanotubes can open an energy gap by quantum confinement effects, and the size of the energy gap can be controlled by structure, making them ideal candidates for constructing high-performance electronic devices. In this talk, the speaker will introduce a new method for directly growing high-quality low-dimensional carbon materials on insulating substrates. Based on this method, the speaker's team has achieved: (1) embedded growth of graphene nanoribbons between boron nitride atomic layers to form an "in-situ encapsulated" graphene nanoribbon structure; (2) direct growth of homochiral and close-packed carbon nanotube arrays to form carbon nanotube van der Waals crystals. In addition, the speaker will also introduce the team’s exploration of the material growth mechanism, as well as the excellent performance of field-effect transistor devices constructed based on these low-dimensional carbon materials.

Speaker

Prof. Zhiwen Shi

School of Physics and Astronomy, SJTU

Time

 2026.4.29 12:00-13:30