Direct fabrication of graphite-mica heterojunction and in situ control of their relative orientation

Bingtong Liu; Jin Wang; Xiaona Peng; Cangyu Qu; Ming Ma; Quanshui Zheng

Materials & Design (Dec 2018)

Direct fabrication of graphite-mica heterojunction and in situ control of their relative orientation

Bingtong Liu,
Jin Wang,
Xiaona Peng,
Cangyu Qu,
Ming Ma,
Quanshui Zheng

Affiliations

Bingtong Liu: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Jin Wang: Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China; Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Xiaona Peng: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Cangyu Qu: Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China; Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
Ming Ma: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China; Corresponding author at: State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China.
Quanshui Zheng: State Key Laboratory of Tribology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China; Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China; Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China

Journal volume & issue: Vol. 160
pp. 371 – 376

Abstract

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In this paper, we directly construct monocrystalline van der Waals heterojunctions by transferring microscale graphite flakes onto millimeter-sized muscovite mica surfaces. The relative orientation between the surfaces is controlled by sliding the graphite flakes with elaborate manipulation. Experimentally the rotation angle of the flake is found to increase with sliding duration and eccentricity. A parameter-free theoretical model is developed, showing good agreement with experimental observations quantitatively. Our results can not only be used to control the frictional and electrical properties of van der Waals heterojunctions via their relative orientation, but also provide a new way in distinguishing friction resulted from edges or from the in-plane interactions. Keywords: Graphite, Mica, Relative orientation, Heterojunction

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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