Silicene‐based van der Waals heterostructures are theoretically predicted to have interesting physical properties, but their experimental fabrication has remained a challenge because of the easy oxidation of silicene in air. Here, the fabrication of graphene/silicene van der Waals heterostructures by silicon intercalation is reported. Density functional theory calculations show weak interactions between graphene and silicene layers, confirming the formation of van der Waals heterostructures. The heterostructures show no observable damage after air exposure for extended periods, indicating good air stability. The I–V characteristics of the vertical graphene/silicene/Ru heterostructures show rectification behavior.

中文翻译：

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石墨烯/有机硅范德华异质结构中的稳定硅

理论上预测了基于硅的范德华异质结构具有有趣的物理性质，但是由于硅在空气中易于氧化，因此它们的实验制造仍然是一个挑战。在此，报道了通过硅嵌入来制造石墨烯/硅范德华异质结构。密度泛函理论计算表明，石墨烯和硅烯层之间的相互作用较弱，这证实了范德华力异质结构的形成。长时间暴露于空气中后，异质结构没有可观察到的损坏，表明良好的空气稳定性。垂直石墨烯/硅烯/钌异质结构的I – V特性显示出整流行为。