[论文解读] Suppressed Rupture of Thin Metal Films via van der Waals Epitaxy

Wenxiang Wang, Jiaxing Wang+10 more|arXiv (Cornell University)|Feb 23, 2026

Graphene research and applications被引用 0

一句话总结

论文表明石墨烯作为范德华模板抑制超薄金膜的破裂，使其在高温下保持稳定并改善结构。

ABSTRACT

Ultrathin metal films exhibit liquid-like instabilities, rupturing via surface diffusion far below their melting points. This behavior constrains thermal budgets for advanced integrated circuits and emerging 2D-crystal devices. Here, we demonstrate that these instabilities can be fundamentally suppressed using graphene as a van der Waals (vdW) template. While conventional 20-nm-thick gold films break up into islands below 300 { extdegree}C, templated films not only remain stable but also become structurally refined after annealing above 600 { extdegree}C. This exceptional stability stems from a vdW-mediated crystallographic texture that reorganizes grain boundaries into a mechanically robust network. This mechanism significantly widens the processing window for nanoscale interconnects and enables high-temperature integration of metals with 2D-crystal technologies.

研究动机与目标

• Motivate and demonstrate suppression of liquid-like instabilities in ultrathin metal films.
• Show that graphene vdW templating can stabilize films during annealing.
• Elucidate the mechanism by which vdW templating reorganizes grain boundaries into a robust network.

提出的方法

• Use graphene as a van der Waals template for ultrathin gold films.
• Compare stability of templated vs. non-templated films during annealing up to high temperatures.
• Analyze how a vdW-mediated crystallographic texture reorganizes grain boundaries.
• Demonstrate structural refinement after annealing above 600°C.

实验结果

研究问题

• RQ1 Can graphene via van der Waals epitaxy suppress rupture in ultrathin metal films?
• RQ2 What role does vdW templating play in crystallographic texture and grain-boundary mechanics?
• RQ3 How does annealing temperature affect stability and structure of templated films?
• RQ4 What are the implications for processing windows in nanoscale interconnects and 2D-crystal integration?

主要发现

• Templated films remain stable and do not rupture below 300°C, unlike conventional 20-nm-thick gold films.
• Templated films become structurally refined after annealing above 600°C.
• Stability arises from a vdW-mediated crystallographic texture that reorganizes grain boundaries into a robust network.
• This mechanism widens the processing window for nanoscale interconnects and enables high-temperature metal integration with 2D-crystal technologies.