Volume 258, Issue 5 2000560
Research Article

The Fabrication of Wrinkle-Free Graphene Patterns on Ge(110) Substrate

Tianbo Wang

Tianbo Wang

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049 P. R. China

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Panlin Li

Panlin Li

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049 P. R. China

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Min Gao

Min Gao

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049 P. R. China

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Yalan Wang

Yalan Wang

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No.19(A) Yuquan Road, Shijingshan District, Beijing, 100049 P. R. China

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Zengfeng Di

Zengfeng Di

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

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Zhongying Xue

Corresponding Author

Zhongying Xue

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

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Miao Zhang

Corresponding Author

Miao Zhang

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai, 200050 P. R. China

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First published: 16 February 2021
Citations: 2

The data that support the findings of this study are available from the corresponding author upon reasonable request.

Abstract

A thermal expansion mismatch is inevitable for graphene grown on various substrates by chemical vapor deposition, which leads to the formation of wrinkles during post-growth cooling. Wrinkles can degrade the superior properties of graphene and increase device-to-device inconsistency. To address this issue, wrinkle-free graphene patterns are grown on Ge(110) substrate with the assistance of 5 × 1016 cm−2 Si ion implantation. The experimental data show that the wrinkle-free graphene can grow on unimplanted areas, whereas no graphene is synthesized on Si ion implanted areas. Further research shows that the wrinkle-free nature of graphene is closely related to the compressive strain distribution in graphene. The compressive strain in graphene is increased to a significant extent with an increase in the size of graphene patterns. When the compressive strain energy exceeds the wrinkle-formation barrier, wrinkles emerge on the graphene, and the compressive strain decreases as a consequence. This research may help to understand the formation mechanisms of graphene wrinkles and promote the growth of wrinkle-free graphene.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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