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Epitaxial growth of graphene on Ir(111) by liquid precursor deposition

机译：液相前驱体在Ir（111）上外延生长石墨烯

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摘要

The epitaxial growth of graphene on the surface of an Ir/YSZ/Si(111) multilayer substrate via the deposition of a liquid carbon precursor (acetone) was investigated by x-ray photoelectron spectroscopy, x-ray photoelectron diffraction, low-energy electron diffraction (LEED), and Fermi surface mapping. It is shown that the onset of graphene formation starts in a low temperature range around 600 K and that subsequent annealing up to 1000 K finally results in well-ordered graphene monolayers. Comparison of temperature-dependent LEED data with model calculations suggests that the growth of graphene takes place via a backbonelike growth by the formation of a hexagonal network connecting the hep and fee configuration sites within the ~10 x 10/9 x 9 supercell. In LEED, the low intensities of the superstructure related satellite spots give evidence for only small corrugations of the graphene layer due to weak interaction with the Ir(111) surface, making graphene on Ir(111) similar to free-standing graphene with the Fermi surface providing distinct spots at the K points.
机译：通过X射线光电子能谱，X射线光电子衍射，低能电子研究了通过沉积液态碳前体（丙酮）在Ir / YSZ / Si（111）多层基板表面上石墨烯的外延生长。衍射（LEED）和费米表面映射。结果表明，石墨烯的形成开始于约600 K的低温范围，随后退火至1000 K最终导致石墨烯单层排列整齐。与温度相关的LEED数据与模型计算的比较表明，石墨烯的生长是通过骨干状生长来实现的，该生长是通过形成一个六角形网络来形成的，该六角形网络连接〜10 x 10/9 x 9超级电池中的hep和Fee构型位点。在LEED中，与上层结构相关的卫星斑点的低强度提供了仅因与Ir（111）表面相互作用弱而导致石墨烯层很小波纹的证据，从而使Ir（111）上的石墨烯类似于费米自立式石墨烯在K点提供明显斑点的表面。

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  • 来源
    《Physical review》 |2011年第7ptab期|p.075472.1-075472.12|共12页
  • 作者

    Frank Mueller; Samuel Grandthyll; Christian Zeitz; Karin Jacobs; Stefan Hiifner; Stefan Gsell; Matthias Schreck;

  • 作者单位

    Experimental Physics, Saarland University, D-66123 Saarbriicken, Germany;

    Experimental Physics, Saarland University, D-66123 Saarbriicken, Germany;

    Experimental Physics, Saarland University, D-66123 Saarbriicken, Germany;

    Experimental Physics, Saarland University, D-66123 Saarbriicken, Germany;

    Experimental Physics, Saarland University, D-66123 Saarbriicken, Germany;

    Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany;

    Institute of Physics, University of Augsburg, D-86135 Augsburg, Germany;

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  • 正文语种 eng
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  • 关键词

    self-assembly;

    机译：自组装;

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