鳞片
材料科学
原子力显微镜
纳米核糖学
显微镜
复合材料
纳米技术
光学
物理
作者
Yanmin Liu,Aisheng Song,Zhi Xu,Ruilong Zong,Jie Zhang,Wenyan Yang,Rong Wang,Yuanzhong Hu,Jianbin Luo,Tianbao Ma
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-07-30
卷期号:12 (8): 7638-7646
被引量:142
标识
DOI:10.1021/acsnano.7b09083
摘要
Interlayer friction between the atomic planes of 2D materials and heterostructures is a promising probe of the physics in their interlayer couplings and superlubricity. However, it is still challenging to measure the interlayer friction between well-defined 2D layers. We propose an approach of thermally assisted mechanical exfoliation and transfer to fabricate various 2D flake-wrapped atomic force microscopy (AFM) tips and to directly measure the interlayer friction between 2D flakes in single-crystalline contact. First, superlubricity between different 2D flakes and layered bulk materials is achieved with a friction coefficient as low as 10–4. The rotation angle dependence of superlubricity is observed for friction between graphite layers, whereas it is not observed between graphite and h-BN because of the incommensurate contact of the mismatched lattices. Second, the interlayer lateral force map between ReS2 layers is measured with atomic resolution, showing hexagonal patterns, as further verified by theoretical simulations. The tribological system constructed here offers an experimental platform to study interlayer couplings and friction between 2D flakes and layered bulk materials.
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