Nano-Stitching of Graphene Bilayers: A First-Principles Study
نویسندگان
چکیده
A nano-stitching method is proposed and investigated to modify graphene bilayers. Based this method, four types of low energy carbon allotropes, ”wormhole graphene” allotropoes, are obtained and their structures, stabilities and electronic properties are investigated using first principles methods. We find that all of these wormhole graphene allotropoes are more favorable than graphdiyne and dynamically stable. Similar to carbon nanotubes and fullerences, these graphene allotropes are expected to act as two-dimensional periodic nano-capsules for encapsulating magnetic atoms or functional clusters for a variety of applications.
منابع مشابه
Van Hove singularities and excitonic effects in the optical conductivity of twisted bilayer graphene.
We report a systematic study of the optical conductivity of twisted bilayer graphene (tBLG) across a large energy range (1.2-5.6 eV) for various twist angles, combined with first-principles calculations. At previously unexplored high energies, our data show signatures of multiple van Hove singularities (vHSs) in the tBLG bands as well as the nonlinearity of the single layer graphene bands and t...
متن کاملSpatially-resolved structure and electronic properties of graphene on polycrystalline Ni.
We have used in situ low-energy electron microscopy (LEEM) to correlate the atomic and electronic structure of graphene films on polycrystalline Ni with nm-scale spatial resolution. Spatially resolved electron scattering measurements show that graphene monolayers formed by carbon segregation do not support the π-plasmon of graphene, indicating strong covalent bonding to the Ni. Graphene bilayer...
متن کاملGraphene structures at an extreme degree of buckling.
The distinctive properties of graphene sheets may be significantly influenced by the presence of corrugation structures. Our understanding of these graphene structures has been limited to the mesoscopic scale. Here we characterize angstrom-scale periodic buckling structures in free-standing graphene bilayers produced by liquid-phase processing in the absence of specific substrates. Monochromate...
متن کاملLocalization of dirac electrons in rotated graphene bilayers.
For Dirac electrons the Klein paradox implies that the confinement is difficult to achieve with an electrostatic potential although it can be of great importance for graphene-based devices. Here, ab initio and tight-binding approaches are combined and show that the wave function of Dirac electrons can be localized in rotated graphene bilayers due to the Moire pattern. This localization of wave ...
متن کاملCharging the Quantum Capacitance of Graphene with a Single Biological Ion Channel
The interaction of cell and organelle membranes (lipid bilayers) with nanoelectronics can enable new technologies to sense and measure electrophysiology in qualitatively new ways. To date, a variety of sensing devices have been demonstrated to measure membrane currents through macroscopic numbers of ion channels. However, nanoelectronic based sensing of single ion channel currents has been a ch...
متن کامل