title: Graphene edges and beyond: temperature-driven structures and electromagnetic properties.
abstract: The atomic configuration of graphene edges significantly influences the various properties of graphene nanostructures, and realistic device fabrication requires precise engineering of graphene edges. However, the imaging and analysis of the intrinsic nature of graphene edges can be illusive due to contamination problems and measurement-induced structural changes to graphene edges. In this issue of ACS Nano, He et al. report an in situ heating experiment in aberration-corrected transmission electron microscopy to elucidate the temperature dependence of graphene edge termination at the atomic scale. They revealed that graphene edges predominantly have zigzag terminations below 400 °C, while above 600 °C, the edges are dominated by armchair and reconstructed zigzag edges. This report brings us one step closer to the true nature of graphene edges. In this Perspective, we outline the present understanding, issues, and future challenges faced in the field of graphene-edge-based nanodevices.
authors.forename: Changbae
authors.initials: C
authors.lastname: Hyun
authors.affiliation: ∥Department of Chemistry, Pohang University of Science and Technology, Pohang 790-784, Korea.
authors.forename: Jeonghun
authors.initials: J
authors.lastname: Yun
authors.forename: Woo Jong
authors.initials: WJ
authors.lastname: Cho
authors.forename: Chang Woo
authors.initials: CW
authors.lastname: Myung
authors.forename: Jaesung
authors.initials: J
authors.lastname: Park
authors.forename: Geunsik
authors.initials: G
authors.lastname: Lee
authors.forename: Zonghoon
authors.initials: Z
authors.lastname: Lee
authors.forename: Kwanpyo
authors.initials: K
authors.lastname: Kim
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim