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| Format: | Preprint |
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2026
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| Online-Zugang: | https://arxiv.org/abs/2604.15639 |
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| _version_ | 1866911601118937088 |
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| author | Xue, Chaowu Sun, Mengzhao Zhou, Zixuan Yao, Zhuoran Shen, Li-Qun Kong, Xiao Zhao, Honglong Ding, Feng Willinger, Marc Liu, Zhongkai Wang, Zhu-Jun |
| author_facet | Xue, Chaowu Sun, Mengzhao Zhou, Zixuan Yao, Zhuoran Shen, Li-Qun Kong, Xiao Zhao, Honglong Ding, Feng Willinger, Marc Liu, Zhongkai Wang, Zhu-Jun |
| contents | Twisted graphene layers (TGLs) provide a powerful platform for investigating multiple quantum phenomena, yet their scalable deployment is hindered by the lack of reliable synthesis with precise angle. Here, benefited from a deeper understanding of the interplay between grain index and graphene growth kinetics, we report a scalable strategy to grow TGLs with pre-designed twist angles on platinum (Pt) via chemical vapor deposition (CVD), Through a combination of complementary in situ methods, we identified the activity sequence of different Pt grains and attributed it to the area ratio of exposed (110) facets during graphene-induced surface reconstruction. Moreover, we revealed that CVD-grown graphene orientation is determined by the grain-orientation-dependent surface morphology. By leveraging the so-established correlations between grain index with both graphene growth priority and its orientation, we achieve controlled folding and tearing of graphene overlayer using a pair of adjacent grains with dramatically different catalytical activity and kink-free atomic steps. We reveal that overlayer-induced step bunching and terrace reconfiguration critically govern the domain morphology and folding direction. Building on this mechanistic insight, we demonstrate a substrate-engineering framework where specific platinum grains are rationally selected to yield TGLs with pre-designed twist angles, including magic angle with flat band dispersion. This work not only highlights fundamental kinetics of Pt catalyzed graphene CVD growth, but also offers a generalizable methodology for manipulating foldable two-dimensional materials via dynamic substrate reconstruction, exampled by programmable growth of high-quality TGLs on open surfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_15639 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Facet-dependent Chemical Kinetics Governed Growth of Twisted Graphene Layers with Pre-designed Angles Xue, Chaowu Sun, Mengzhao Zhou, Zixuan Yao, Zhuoran Shen, Li-Qun Kong, Xiao Zhao, Honglong Ding, Feng Willinger, Marc Liu, Zhongkai Wang, Zhu-Jun Materials Science Chemical Physics Twisted graphene layers (TGLs) provide a powerful platform for investigating multiple quantum phenomena, yet their scalable deployment is hindered by the lack of reliable synthesis with precise angle. Here, benefited from a deeper understanding of the interplay between grain index and graphene growth kinetics, we report a scalable strategy to grow TGLs with pre-designed twist angles on platinum (Pt) via chemical vapor deposition (CVD), Through a combination of complementary in situ methods, we identified the activity sequence of different Pt grains and attributed it to the area ratio of exposed (110) facets during graphene-induced surface reconstruction. Moreover, we revealed that CVD-grown graphene orientation is determined by the grain-orientation-dependent surface morphology. By leveraging the so-established correlations between grain index with both graphene growth priority and its orientation, we achieve controlled folding and tearing of graphene overlayer using a pair of adjacent grains with dramatically different catalytical activity and kink-free atomic steps. We reveal that overlayer-induced step bunching and terrace reconfiguration critically govern the domain morphology and folding direction. Building on this mechanistic insight, we demonstrate a substrate-engineering framework where specific platinum grains are rationally selected to yield TGLs with pre-designed twist angles, including magic angle with flat band dispersion. This work not only highlights fundamental kinetics of Pt catalyzed graphene CVD growth, but also offers a generalizable methodology for manipulating foldable two-dimensional materials via dynamic substrate reconstruction, exampled by programmable growth of high-quality TGLs on open surfaces. |
| title | Facet-dependent Chemical Kinetics Governed Growth of Twisted Graphene Layers with Pre-designed Angles |
| topic | Materials Science Chemical Physics |
| url | https://arxiv.org/abs/2604.15639 |