Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacký University, 77146 Olomouc, Czech Republic.
ACS Nano. 2013 Feb 26;7(2):1646-51. doi: 10.1021/nn305608a. Epub 2013 Jan 30.
The two-dimensional material graphene has numerous potential applications in nano(opto)electronics, which inevitably involve metal graphene interfaces.Theoretical approaches have been employed to examine metal graphene interfaces, but experimental evidence is currently lacking. Here, we combine atomic force microscopy (AFM) based dynamic force measurements and density functional theory calculations to quantify the interaction between metal-coated AFM tips and graphene under ambient conditions. The results show that copper has the strongest affinity to graphene among the studied metals (Cu, Ag, Au, Pt, Si), which has important implications for the construction of a new generation of electronic devices. Observed differences in the nature of the metal-graphene bonding are well reproduced by the calculations, which included nonlocal Hartree-Fock exchange and van der Waals effects.
二维材料石墨烯在纳（光）电子学中有许多潜在的应用，这不可避免地涉及到金属-石墨烯界面。理论方法已被用于研究金属-石墨烯界面，但目前缺乏实验证据。在这里，我们结合原子力显微镜（AFM）基于动态力测量和密度泛函理论计算来量化在环境条件下金属涂层 AFM 探针和石墨烯之间的相互作用。结果表明，在所研究的金属（Cu、Ag、Au、Pt、Si）中，铜对石墨烯具有最强的亲和力，这对构建新一代电子器件具有重要意义。观察到的金属-石墨烯键合性质的差异通过计算得到了很好的再现，其中包括非局域 Hartree-Fock 交换和范德华效应。
