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미래를 창조하는 포스텍 화학공학과

All-Dry Transfer of Graphene Film by van der Waals Interactions

Year of publication
Title of paper
All-Dry Transfer of Graphene Film by van der Waals Interactions
Author
[김철주교수 연구실]
Publication in journal
Nano Letters 19, p3590-3596, 2019
Publication date
20190513


[Abstract]

We report a method that uses van der Waals interactions to transfer continuous, high-quality graphene films from Ge(110) to a different substrate held by hexagonal boron nitride carriers in a clean, dry environment. The transferred films are uniform and continuous with low defect density and few charge puddles. The transfer is effective because of the weak interfacial adhesion energy between graphene and Ge. Based on the minimum strain energy required for the isolation of film, the upper limit of the interfacial adhesion energy is estimated to be 23 meV per carbon atom, which makes graphene/Ge(110) the first as-grown graphene film that has a substrate adhesion energy lower than that of typical van der Waals interactions between layered materials. Our results suggest that graphene on Ge can serve as an ideal material platform to be integrated with other material systems by a clean assembly process.

 

DOI: https://doi.org/10.1021/acs.nanolett.9b00555

LINK: https://pubs.acs.org/doi/10.1021/acs.nanolett.9b00555