Caccia Mario, Giuranno Donatella, Molina-Jorda José M, Moral Mónica, Nowak Rafal, Ricci Enrica, Sobczak Natalie, Narciso Javier, Fernández Sanz Javier
Departamento de Química Inorgánica e Instituto Universitario de Materiales de Alicante , Universidad de Alicante , 03690 San Vicente del Raspeig , Alicante , Spain.
Institute of Condensed Matter Chemistry and Energy Technologies (ICMATE) , National Research Council (CNR) , 16149 Genoa , Italy.
J Phys Chem Lett. 2018 Jul 19;9(14):3850-3855. doi: 10.1021/acs.jpclett.8b01384. Epub 2018 Jun 29.
Integration of graphene into electronic circuits through its joining with conventional metal electrodes (i.e., gold) appears to be one of the main technological challenges nowadays. To gain insight into this junction, we have studied the physicochemical interactions between SiC-supported graphene and a drop of molten gold. Using appropriate high-temperature experimental conditions, we perform wetting experiments and determine contact angles for gold drops supported on graphene epitaxially grown on 4H-SiC. The properties of the metal/graphene interface are analyzed using a wide variety of characterization techniques, along with computational simulations based on density functional theory. In contrast with the established literature, our outcomes clearly show that graphene is translucent in the gold/graphene/SiC interface, and therefore its integration into electronic circuits primarily depends on the right choice of the support to produce favorable wetting interactions with liquid gold.
如今，通过将石墨烯与传统金属电极（即金）结合而将其集成到电子电路中似乎是主要的技术挑战之一。为了深入了解这种连接，我们研究了碳化硅支撑的石墨烯与一滴熔金之间的物理化学相互作用。利用适当的高温实验条件，我们进行了润湿性实验，并确定了在4H-SiC上外延生长的石墨烯上支撑的金滴的接触角。使用各种表征技术以及基于密度泛函理论的计算模拟来分析金属/石墨烯界面的性质。与已有的文献相反，我们的结果清楚地表明，在金/石墨烯/碳化硅界面中石墨烯是半透明的，因此将其集成到电子电路中主要取决于对支撑体的正确选择，以便与液态金产生良好的润湿性相互作用。
