Topological Design of Graphene

@article{Ni2019TopologicalDO,
  title={Topological Design of Graphene},
  author={Bo Ni and Teng Zhang and Jiaoyan Li and Xiaoyan Li and Huajian Gao},
  journal={Handbook of Graphene},
  year={2019}
}
Topological defects (e.g. pentagons, heptagons and pentagon-heptagon pairs) have been widely observed in large scale graphene and have been recognized to play important roles in tailoring the mechanical and physical properties of two-dimensional materials in general. Thanks to intensive studies over the past few years, optimizing properties of graphene through topological design has become a new and promising direction of research. In this chapter, we review some of the recent advances in… Expand
Structural Defects, Mechanical Behaviors, and Properties of Two-Dimensional Materials
TLDR
This review mainly emphasized the underlying deformation and fracture mechanisms and the influences of various defects on mechanical behaviors and properties, which boost the emergence and development of topological design and defect engineering. Expand
Pathways to controlled 3D deformation of graphene: Manipulating the motion of topological defects
Abstract Functional properties of 2D materials like graphene can be tailored by designing their 3D structure at the Angstrom to nanometer scale. While there are routes to tailoring 3D structure atExpand
Enhanced Bonding of Pentagon–Heptagon Defects in Graphene to Metal Surfaces: Insights from the Adsorption of Azulene and Naphthalene to Pt(111)
The performance of graphene-based (opto)electronic devices depends critically on the graphene/metal interface formed at the metal contacts. We show here that the interface properties may be control...
Deep Learning Segmentation of Complex Features in Atomic-Resolution Phase-Contrast Transmission Electron Microscopy Images
TLDR
This study compares the performance of a conventional Bragg filtering method with a deep learning routine based on the U-Net architecture and shows that the deep learning method is more general, simpler to apply in practice, and produces more accurate and robust results than the conventional algorithm. Expand
S1431927621000167jra 804..814
  • 2021

References

SHOWING 1-10 OF 223 REFERENCES
The nature of strength enhancement and weakening by pentagon-heptagon defects in graphene.
TLDR
It is shown here that GB strength can either increase or decrease with the tilt, and the behaviour can be explained well by continuum mechanics. Expand
Defects controlled wrinkling and topological design in graphene
Abstract Due to its atomic scale thickness, the deformation energy in a free standing graphene sheet can be easily released through out-of-plane wrinkles which, if controllable, may be used to tuneExpand
Designing graphene structures with controlled distributions of topological defects: A case study of toughness enhancement in graphene ruga
A novel design methodology combining phase field crystal method and atomistic simulations is proposed to solve the inverse problem of finding the optimized distribution and type of topologicalExpand
Defect-detriment to graphene strength is concealed by local probe: the topological and geometrical effects.
TLDR
It is demonstrated through atomistic simulations and theoretical analysis that local response of two-dimensional crystals can even be stiffened and strengthened by topological defects as the structure under indentation features a positive Gaussian curvature, while softened and weakened mechanical responses are measured at locations with negativeGaussian curvatures. Expand
Mechanical properties of wrinkled graphene generated by topological defects
Abstract In a free standing graphene with topological defects, e.g. heptagons and pentagons, the out-of-plane wrinkles are generated to release in-plane deformation energy. In this work, differentExpand
A review on mechanics and mechanical properties of 2D materials—Graphene and beyond
Since the first successful synthesis of graphene just over a decade ago, a variety of two-dimensional (2D) materials (e.g., transition metal-dichalcogenides, hexagonal boron-nitride, etc.) have beenExpand
Three-dimensional periodic graphenenanostructures
Graphene is a basic building block for many known and emerging carbon-based materials whose properties largely depend on the way how graphene is structured at the nanoscale. Synthesis of novelExpand
Effects of topological defects and local curvature on the electronic properties of planar graphene
Abstract A formalism is proposed to study the electronic and transport properties of graphene sheets with corrugations as the one recently synthesized. The formalism is based on coupling the DiracExpand
An extended defect in graphene as a metallic wire.
TLDR
The realization of a one-dimensional topological defect in graphene, containing octagonal and pentagonal sp(2)-hybridized carbon rings embedded in a perfect graphene sheet is reported, which acts as a quasi-one-dimensional metallic wire. Expand
Tearing graphene sheets from adhesive substrates produces tapered nanoribbons.
TLDR
A bottom-up investigation of the tearing of graphene sheets from adhesive substrates is reported, including the discovery of the formation of tapered graphene nanoribbons, and it is shown that the resulting nan oribbon geometry is controlled by both the graphene-substrate adhesion energy and by the number of torn graphene layers. Expand
...
1
2
3
4
5
...