Local work function on graphene nanoribbons.

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Beilstein Journal of Nanotechnology Pub Date : 2024-08-29 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.91
Daniel Rothhardt, Amina Kimouche, Tillmann Klamroth, Regina Hoffmann-Vogel
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Abstract

Graphene nanoribbons show exciting electronic properties related to the exotic nature of the charge carriers and to local confinement as well as atomic-scale structural details. The local work function provides evidence for such structural, electronic, and chemical variations at surfaces. Kelvin prove force microscopy can be used to measure the local contact potential difference (LCPD) between a probe tip and a surface, related to the work function. Here we use this technique to map the LCPD of graphene nanoribbons grown on a Au(111) substrate. The LCPD data shows charge transfer between the graphene nanoribbons and the gold substrate. Our results are corroborated with density functional theory calculations, which verify that the maps reflect the doping of the nanoribbons. Our results help to understand the relation between atomic structure and electronic properties both in high-resolution images and in the distance dependence of the LCPD.

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石墨烯纳米带的局部功函数
石墨烯纳米带显示出令人兴奋的电子特性,这与电荷载流子的奇异性质、局部约束以及原子尺度的结构细节有关。局部功函数为表面的这种结构、电子和化学变化提供了证据。开尔文证明力显微镜可用于测量探针尖端与表面之间与功函数相关的局部接触电位差(LCPD)。在此,我们使用该技术绘制了生长在金(111)基底上的石墨烯纳米带的 LCPD 图。LCPD 数据显示了石墨烯纳米带与金基底之间的电荷转移。密度泛函理论计算证实了我们的结果,该计算验证了图谱反映了纳米带的掺杂情况。我们的研究结果有助于理解高分辨率图像和 LCPD 的距离依赖性中原子结构与电子特性之间的关系。
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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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