Graphene Translucency and Interfacial Interactions in the Gold/Graphene/SiC System
Graphene Translucency and Interfacial Interactions in the Gold/Graphene/SiC System
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DOI：
10.1021/acs.jpclett.8b01384
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发表时间：
2018-07-19
影响因子：
5.7
通讯作者：
Ferrindez Sanz, Javier
中科院分区：
文献类型：
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作者：
Caccia, Mario;Giuranno, Donatella;Ferrindez Sanz, Javier
通过石墨烯与常规金属电极的连接将石墨烯集成到电子电路中（即，黄金）似乎是当今的主要技术挑战之一。为了深入了解这种结，我们研究了SiC支撑的石墨烯和一滴熔融金之间的物理化学相互作用。使用适当的高温实验条件下，我们进行润湿实验，并确定接触角的金滴支持在4 H-SiC上外延生长的石墨烯。金属/石墨烯界面的性质进行了分析，使用各种各样的表征技术，沿着基于密度泛函理论的计算模拟。与现有文献相比，我们的结果清楚地表明，石墨烯在金/石墨烯/SiC界面中是半透明的，因此其集成到电子电路中主要取决于正确选择支持物以与液体金产生有利的润湿相互作用。
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.