3,4,5-三甲氧基苯基接枝的石墨烯/铜的界面化学

Interface Chemistry of Graphene/Cu Grafted By 3,4,5-Tri-Methoxyphenyl.

作者信息

Ambrosio Gina, Drera Giovanni, Di Santo Giovanni, Petaccia Luca, Daukiya Lakshya, Brown Anton, Hirsch Brandon, De Feyter Steven, Sangaletti Luigi, Pagliara Stefania

机构信息

I-LAMP and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Via dei Musei 41, 25121, Brescia, Italy.

Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.

出版信息

Sci Rep. 2020 Mar 5;10(1):4114. doi: 10.1038/s41598-020-60831-8.

DOI:10.1038/s41598-020-60831-8

PMID:32139839

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7058071/

Abstract

Chemical reaction with diazonium molecules has revealed to be a powerful method for the surface chemical modification of graphite, carbon nanotubes and recently also of graphene. Graphene electronic structure modification using diazonium molecules is strongly influenced by graphene growth and by the supporting materials. Here, carrying on a detailed study of core levels and valence band photoemission measurements, we are able to reconstruct the interface chemistry of trimethoxybenzenediazonium-based molecules electrochemically grafted on graphene on copper. The band energy alignment at the molecule-graphene interface has been traced revealing the energy position of the HOMO band with respect to the Fermi level.

摘要

与重氮分子的化学反应已被证明是一种对石墨、碳纳米管以及最近对石墨烯进行表面化学改性的有效方法。使用重氮分子对石墨烯电子结构进行改性受到石墨烯生长和支撑材料的强烈影响。在这里，通过对芯能级和价带光电子能谱测量进行详细研究，我们能够重建电化学接枝在铜上的石墨烯上基于三甲氧基苯重氮的分子的界面化学。已经追踪了分子 - 石墨烯界面处的能带能量排列，揭示了最高占据分子轨道（HOMO）带相对于费米能级的能量位置。