DOI: 10.1073/pnas.1200339109. Uniform hexagonal graphene flakes and films grown on liquid copper surface

Uniform hexagonal graphene flakes and films grown on liquid copper surface

10.1073/pnas.1200339109

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

Unresolved problems associated with the production of graphene materials include the need for greater control over layer number, crystallinity, size, edge structure and spatial orientation, and a better understanding of the underlying mechanisms. Here we report a chemical vapor deposition approach that allows the direct synthesis of uniform single-layered, large-size (up to 10,000 μm 2 ), spatially self-aligned, and single-crystalline hexagonal graphene flakes (HGFs) and their continuous films on liquid Cu surfaces. Employing a liquid Cu surface completely eliminates the grain boundaries in solid polycrystalline Cu, resulting in a uniform nucleation distribution and low graphene nucleation density, but also enables self-assembly of HGFs into compact and ordered structures. These HGFs show an average two-dimensional resistivity of 609 ± 200 Ω and saturation current density of 0.96 ± 0.15 mA/μm, demonstrating their good conductivity and capability for carrying high current density.

Bibliography

Geng, D., Wu, B., Guo, Y., Huang, L., Xue, Y., Chen, J., Yu, G., Jiang, L., Hu, W., & Liu, Y. (2012). Uniform hexagonal graphene flakes and films grown on liquid copper surface. Proceedings of the National Academy of Sciences, 109(21), 7992â7996.

Authors 10

Dechao Geng (first)
Bin Wu (additional)
Yunlong Guo (additional)
Liping Huang (additional)
Yunzhou Xue (additional)
Jianyi Chen (additional)
Gui Yu (additional)
Lang Jiang (additional)
Wenping Hu (additional)
Yunqi Liu (additional)

References 32 Referenced 424

Dates

Type	When
Created	13 years, 4 months ago (April 17, 2012, 1:45 a.m.)
Deposited	3 years, 4 months ago (April 15, 2022, 1:04 a.m.)
Indexed	20 hours, 13 minutes ago (Aug. 30, 2025, 12:37 p.m.)
Issued	13 years, 4 months ago (April 16, 2012)
Published	13 years, 4 months ago (April 16, 2012)
Published Online	13 years, 4 months ago (April 16, 2012)
Published Print	13 years, 3 months ago (May 22, 2012)

Funders 0

None

BibTeX

@article{Geng_2012, title={Uniform hexagonal graphene flakes and films grown on liquid copper surface}, volume={109}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.1200339109}, DOI={10.1073/pnas.1200339109}, number={21}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Geng, Dechao and Wu, Bin and Guo, Yunlong and Huang, Liping and Xue, Yunzhou and Chen, Jianyi and Yu, Gui and Jiang, Lang and Hu, Wenping and Liu, Yunqi}, year={2012}, month=apr, pages={7992–7996} }

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