Inducing electronic changes in graphene through silicon (100) substrate modification.

@article{Xu2011InducingEC,
  title={Inducing electronic changes in graphene through silicon (100) substrate modification.},
  author={Y. Xu and Kevin T. He and Scott W. Schmucker and Z. B. Guo and Justin C. Koepke and Joshua D. Wood and Joseph W. Lyding and Narayana R. Aluru},
  journal={Nano letters},
  year={2011},
  volume={11 7},
  pages={
          2735-42
        }
}
We have performed scanning tunneling microscopy and spectroscopy (STM/STS) measurements as well as ab initio calculations for graphene monolayers on clean and hydrogen(H)-passivated silicon (100) (Si(100)/H) surfaces. In order to experimentally study the same graphene piece on both substrates, we develop a method to depassivate hydrogen from under graphene monolayers on the Si(100)/H surface. Our work represents the first demonstration of successful and reproducible depassivation of hydrogen… Expand
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References

SHOWING 1-10 OF 40 REFERENCES
Atomic structure of graphene on SiO2.
TLDR
Atomic structures and nanoscale morphology of graphene-based electronic devices are revealed for the first time and a strong spatially dependent perturbation is revealed which breaks the hexagonal lattice symmetry of the graphitic lattice. Expand
Substrate-dependent electronic properties of an armchair carbon nanotube adsorbed on H∕Si(001)
The adsorption of an armchair single-walled carbon nanotube (CNT) on fully and partially hydrogenated Si(001) surfaces are studied from first-principles calculations. Our results indicate that theExpand
Separation-dependent electronic transparency of monolayer graphene membranes on III-V semiconductor substrates.
TLDR
Statistical data analysis and density functional theory calculations suggest that this semitransparency phenomenon is due to the scanning tunneling microscope tip pushing the graphene membrane away from its equilibrium location and closer to the substrate surface, causing their electronic states to intermix. Expand
Graphene on the C-terminated SiC (0001̄) surface: An ab initio study
The atomic and electronic structures of a graphene layer on top of the $(2\ifmmode\times\else\texttimes\fi{}2)$ reconstruction of the SiC $(000\overline{1})$ surface are studied from ab initioExpand
Ultrahigh-vacuum scanning tunneling microscopy and spectroscopy of single-walled carbon nanotubes on hydrogen-passivated Si(100) surfaces
Single-walled carbon nanotubes (SWNTs) have been studied on a Si(100)-2×1:H surface using an ultrahigh-vacuum (UHV) scanning tunneling microscope (STM). Dry deposition of SWNTs in situ establishesExpand
First-principles calculations of carbon nanotubes adsorbed on Si(001).
TLDR
The most stable structure shows an increase in the density of states near the Fermi level due to the formation of C-Si bonds enhancing the metallic character of the nanotube by the contact with the surface, and may lead one to consider metallic SWCNs adsorbed on Si substrates for interconnections and contacts on future nanoscale devices. Expand
Ab initio study of semiconducting carbon nanotubes adsorbed on the Si(100) surface: Diameter- and registration-dependent atomic configurations and electronic properties
We present an ab initio study of semiconducting carbon nanotubes adsorbed on an unpassivated Si(100) surface. Despite the usual gap underestimation in density functional theory, a dramatic reductionExpand
Imaging the interface of epitaxial graphene with silicon carbide via scanning tunneling microscopy
Graphene grown epitaxially on SiC has been proposed as a material for carbon-based electronics. Understanding the interface between graphene and the SiC substrate will be important for futureExpand
Electronic structure of epitaxial graphene layers on SiC: effect of the substrate.
TLDR
The graphene is doped and a gap opens at the Dirac point after three Bernal stacked carbon layers are formed and evidence of a charge transfer that depends on the interface geometry is presented. Expand
Substrate-induced bandgap opening in epitaxial graphene.
TLDR
It is shown that when graphene is epitaxially grown on SiC substrate, a gap of approximately 0.26 eV is produced and it is proposed that the origin of this gap is the breaking of sublattice symmetry owing to the graphene-substrate interaction. Expand
...
1
2
3
4
...