On-Surface Synthesis of Graphene Nanoribbons on Two-Dimensional Rare Earth-Gold Intermetallic Compounds.,The Journal of Physical Chemistry Letters

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On-Surface Synthesis of Graphene Nanoribbons on Two-Dimensional Rare Earth-Gold Intermetallic Compounds.
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2020-06-08 , DOI: 10.1021/acs.jpclett.0c01398
Yande Que ₁ , Bin Liu ₁ , Yuan Zhuang ₁ , Chaoqiang Xu ₁ , Kedong Wang ₂ , Xudong Xiao ₁

Affiliation

Here, we demonstrate two reliable routes for the fabrication of armchair-edge graphene nanoribbons (GNRs) on TbAu₂/Au(111), belonging to a class of two-dimensional ferromagnetic rare earth–gold intermetallic compounds. On-surface synthesis directly on TbAu₂ leads to the formation of GNRs, which are short and interconnected with each other. In contrast, the intercalation approach—on-surface synthesis of GNRs directly on Au(111) followed by rare earth intercalation—yields GNRs on TbAu₂/Au(111), where both the ribbons and TbAu₂ are of high quality comparable with those directly grown on clean Au(111). Besides, the as-grown ribbons retain the same band gap while changing from p-doping to weak n-doping mainly due to a change in the work function of the substrate after the rare earth intercalation. The intercalation approach might also be employed to fabricate other types of GNRs on various rare earth intermetallic compounds, providing platforms to tailor the electronic and magnetic properties of GNRs on magnetic substrates.

中文翻译：

在二维稀土-金-金属间化合物上的石墨烯纳米带的表面合成。

在这里，我们演示了在TbAu ₂ / Au（111）上制造扶手椅状边缘石墨烯纳米带（GNR）的两种可靠途径，属于二维铁磁稀土-金金属间化合物。直接在TbAu ₂上进行表面合成会形成GNR，这些GNR较短且相互连接。相比之下，插层方法（在Au（111）上直接在表面上合成GNR，然后进行稀土插层）在TbAu ₂ / Au（111）上产生GNR ，其中带和TbAu ₂具有与直接在纯金（111）上生长的可比的高质量。此外，生长的带材在从p掺杂变为弱n掺杂时保持相同的带隙，这主要是由于稀土插层后衬底的功函数发生了变化。嵌入方法也可用于在各种稀土金属间化合物上制造其他类型的GNR，从而提供平台以定制磁性基材上GNR的电子和磁性。

更新日期：2020-07-02

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