Bottom-up Assembly of Nanoporous Graphene with Emergent Electronic States

• DOI: 10.1021/jacs.0c05235
• Publication Date: 2020-07-09T07:48:09Z
• Authors: Peter H. Jacobse; Ryan D. McCurdy; Jingwei Jiang; Daniel J. Rizzo; Gregory Veber; Paul Butler; Rafał Zuzak; Steven G. Louie; Felix R. Fischer; Michael F. Crommie
• Keywords: Nanoporous; Nanopore

The incorporation of nanoscale pores into a sheet graphene allows it to switch from an impermeable semimetal semiconducting nanosieve. Nanoporous graphenes are desirable for applications ranging high-performance semiconductor device channels atomically thin molecular sieve membranes, and their performance is highly dependent on the periodicity reproducibility at atomic level. Achieving precise nanopore topologies in using top-down lithographic approaches has proven be challenging due poor structural control Alternatively, nanometer-sized can fabricated via lateral fusion bottom-up synthesized nanoribbons. This technique, however, typically requires additional high temperature cross-coupling step following nanoribbon formation that inherently yields conjugation, resulting 2D materials weakly connected both mechanically electronically. Here, we demonstrate novel approach forming fully conjugated nanoporous through single, mild annealing initial polymer formation. We find emergent interface-localized electronic states within bulk band gap hybridize yield dispersive two-dimensional low-energy states. show this rationalized terms edge constituent single-strand localization these around makes material particularly attractive requiring electronically sensitive sieves.