Nitrogen-Doping Induced Self-Assembly of Graphene Nanoribbon-Based Two-Dimensional and Three-Dimensional Metamaterials.

摘要: Narrow graphene nanoribbons (GNRs) constructed by atomically precise bottom-up synthesis from molecular precursors have attracted significant interest as promising materials for nanoelectronics. But there has been little awareness of the potential GNRs to serve nanoscale building blocks novel materials. Here we show that substitutional doping with nitrogen atoms can trigger hierarchical self-assembly into ordered metamaterials. We use doped eight N per unit cell and their undoped analogues, synthesized using both surface-assisted solution approaches, study this on a support in an unrestricted three-dimensional (3D) environment. On surface, N-doping mediates formation hydrogen-bonded GNR sheets. In solution, sheets side-by-side coordinated turn assemble via van der Waals π-stacking interactions 3D stacks, process ultimately produces macroscopic crystalline structures. The optoelectronic proper...