Chemically Derived, Ultrasmooth Graphene Nanoribbon Semiconductors

作者：Xiaolin Li, Xinran Wang, Li Zhang, Sang‐Won Lee, Hongjie Dai · 发表于：Science · 年份：2008 · DOI：10.1126/science.1150878 · 被引用次数：4815 · 研究领域：Graphene research and applications、Molecular Junctions and Nanostructures、Carbon Nanotubes in Composites

We developed a chemical route to produce graphene nanoribbons (GNR) with width below 10 nanometers, as well as single ribbons with varying widths along their lengths or containing lattice-defined graphene junctions for potential molecular electronics. The GNRs were solution-phase-derived, stably suspended in solvents with noncovalent polymer functionalization, and exhibited ultrasmooth edges with possibly well-defined zigzag or armchair-edge structures. Electrical transport experiments showed that, unlike single-walled carbon nanotubes, all of the sub-10-nanometer GNRs produced were semiconductors and afforded graphene field effect transistors with on-off ratios of about 10(7) at room temperature.