Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2509.21908 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866911177861234688 |
|---|---|
| author | Wang, Zhien Wang, Jiangtao Exposito, Diego Krayev, Andrey He, Shih-Ming Zheng, Xudong Hennighausen, Zachariah Brihuega, Ivan Jeong, Se-Young Kong, Jing |
| author_facet | Wang, Zhien Wang, Jiangtao Exposito, Diego Krayev, Andrey He, Shih-Ming Zheng, Xudong Hennighausen, Zachariah Brihuega, Ivan Jeong, Se-Young Kong, Jing |
| contents | Single-orientation stitching of graphene has emerged as the predominant method for growth of large-area, high-quality graphene films. Particularly noteworthy is graphene grown on single-crystalline Cu(111)/sapphire substrates, which exhibits exceptionally planar oriented stitching due to the atomically smooth substrate, facilitating the formation of continuous, high-quality graphene monolayer. These single-orientation stitches have conventionally been regarded as seamless with negligible defect concentrations. In this report, we present experimental observations regarding graphene grown on single-crystalline Cu(111)/sapphire substrates. Among the graphene flakes with single-orientation, our findings reveal two major merging behaviors: one producing the expected seamless stitching, and another unexpectedly generating structural defects that create nanoscale pathways permitting water permeation. Notably, we identify a unique merging structure--overlapped junction, in which the edge of one graphene flake overlaps and lies atop the edge of another flake, rather than forming a continuous atomic stitch. This discovery challenges the conventional anticipation of single-orientation stitched graphene films as seamless single crystalline film, while offers unique perspective for graphene applications in molecular sieving, selective filtration membranes, and protective coatings. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_21908 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Beyond Seamless: Unexpected Defective Merging in Single-Orientation Graphene Wang, Zhien Wang, Jiangtao Exposito, Diego Krayev, Andrey He, Shih-Ming Zheng, Xudong Hennighausen, Zachariah Brihuega, Ivan Jeong, Se-Young Kong, Jing Materials Science Single-orientation stitching of graphene has emerged as the predominant method for growth of large-area, high-quality graphene films. Particularly noteworthy is graphene grown on single-crystalline Cu(111)/sapphire substrates, which exhibits exceptionally planar oriented stitching due to the atomically smooth substrate, facilitating the formation of continuous, high-quality graphene monolayer. These single-orientation stitches have conventionally been regarded as seamless with negligible defect concentrations. In this report, we present experimental observations regarding graphene grown on single-crystalline Cu(111)/sapphire substrates. Among the graphene flakes with single-orientation, our findings reveal two major merging behaviors: one producing the expected seamless stitching, and another unexpectedly generating structural defects that create nanoscale pathways permitting water permeation. Notably, we identify a unique merging structure--overlapped junction, in which the edge of one graphene flake overlaps and lies atop the edge of another flake, rather than forming a continuous atomic stitch. This discovery challenges the conventional anticipation of single-orientation stitched graphene films as seamless single crystalline film, while offers unique perspective for graphene applications in molecular sieving, selective filtration membranes, and protective coatings. |
| title | Beyond Seamless: Unexpected Defective Merging in Single-Orientation Graphene |
| topic | Materials Science |
| url | https://arxiv.org/abs/2509.21908 |