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High Layer Uniformity of Two-Dimensional Materials Demonstrated Surprisingly from Broad Features in Surface Electron Diffraction.
Chen, S; Horn von Hoegen, M; Thiel, P A; Kaminski, A; Schrunk, B; Speliotis, T; Conrad, E H; Tringides, M C.
Afiliación
  • Chen S; Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.
  • Horn von Hoegen M; Department of Physics and Center for Nanointegration CENIDE, University of Duisburg-Essen, Lotharstrasse 1, 47057 Duisburg, Germany.
  • Thiel PA; Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.
  • Kaminski A; Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.
  • Schrunk B; Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.
  • Speliotis T; Institute of Nanoscience and Nanotechnology, National Center for Scientific Research Demokritos, Agia Paraskevi, 15310 Athens, Greece.
  • Conrad EH; Department of Physics, Georgia Technology Institute, 837 State Street, Atlanta, Georgia 30332-0430, United States.
  • Tringides MC; Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011, United States.
J Phys Chem Lett ; 11(21): 8937-8943, 2020 Nov 05.
Article en En | MEDLINE | ID: mdl-32902297
Paradoxically, a very broad diffraction background, named the bell-shaped-component (BSC), has been established as a feature of graphene growth. Recent diffraction studies as a function of electron energy have shown that the BSC is not related to scattering interference. Here, additional experiments are carried out as a function of temperature over the range in which single-layer graphene (SLG) grows. Quantitative fitting of the profiles shows that the BSC follows the increase of the Gr(10) spot, proving directly that the BSC indicates high-quality graphene. Additional metal deposition experiments provide more information about the BSC. The BSC is insensitive to metal deposition, and it increases with metal intercalation, because a more uniform interface forms between graphene and SiC. These experiments support the conclusion that the BSC originates from electron confinement within SLG, and surprisingly, it is an excellent measure of graphene uniformity.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Chem Lett Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Chem Lett Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos