Experimentally Engineering the Edge Termination of Graphene Nanoribbons
arXiv:1205.3516 · doi:10.1021/nn303730v
Abstract
The edges of graphene nanoribbons (GNRs) have attracted much interest due to their potentially strong influence on GNR electronic and magnetic properties. Here we report the ability to engineer the microscopic edge termination of high quality GNRs via hydrogen plasma etching. Using a combination of high-resolution scanning tunneling microscopy and first-principles calculations, we have determined the exact atomic structure of plasma-etched GNR edges and established the chemical nature of terminating functional groups for zigzag, armchair and chiral edge orientations. We find that the edges of hydrogen-plasma-etched GNRs are generally flat, free of structural reconstructions and are terminated by hydrogen atoms with no rehybridization of the outermost carbon edge atoms. Both zigzag and chiral edges show the presence of edge states.
16+9 pages, 3+4 figures
References in corpus (7)
- Half-Metallic Graphene Nanoribbons
- Control of graphene's properties by reversible hydrogenation
- Graphane: a two-dimensional hydrocarbon
- Magnetic Correlations at Graphene Edges
- Structure, Stability, Edge States and Aromaticity of Graphene Ribbons
- Edge state on hydrogen-terminated graphite edges investigated by scanning tunneling microscopy
- Clar's Theory, STM Images, and Geometry of Graphene Nanoribbons
Cited by in corpus (15)
- Substrate-Independent Growth of Atomically Precise Chiral Graphene Nanoribbons
- Gaussian deformations in graphene ribbons: flowers and confinement
- Super-Resolution Nanolithography of Two-Dimensional Materials by Anisotropic Etching
- Engineering polar discontinuities in honeycomb lattices
- Single-Material Graphene Thermocouples
- The edge engineering of topological Bi(111) bilayer
- High performance current and spin diode of atomic carbon chain between transversely symmetric ribbon electrodes
- Electric field control of the indirect magnetic coupling through a short graphene nanoribbon
- Breakdown of topological protection due to non-magnetic edge disorder in two-dimensional materials in the Quantum Spin Hall phase
- Characterization of Hydrogen Plasma Defined Graphene Edges
- Charge Localization and Hopping in a Topologically Engineered GNR
- Termination of Graphene Edges Created by Hydrogen and Deuterium Plasmas
- Dynamic RKKY interaction between magnetic moments in graphene nanoribbons
- Topology as a Design Variable for Multiproperty Engineering in Synthesized 4-5-6-8 Carbon Nanoribbons
- Hexa-Graphyne: A Transparent and Semimetallic 2D Carbon Allotrope with Distinct Optical Properties