Title: | UItra-low friction and edge-pinning effect in large-lattice-mismatch van der Waals heterostructures | Authors: | Liao, Mengzhou Nicolini, Paolo Du, Luojun Yuan, Jiahao Wang, Shuopei Yu, Hua Tang, Jian Cheng, Peng Watanabe, Kenji Taniguchi, Takashi Gu, Lin Claerbout, Victor E.P. Silva, Andrea Kramer, Denis Polcar, Tomas Yang, Rong Shi, Dongxia Zhang, Guangyu |
Language: | eng | Issue Date: | 5-Aug-2021 | Publisher: | Nature Publishing Group | Document Type: | Article | Journal / Series / Working Paper (HSU): | Nature Materials | Volume: | 21 | Issue: | 1 | Page Start: | 47 | Page End: | 53 | Publisher Place: | Basingstoke | Abstract: | Two-dimensional heterostructures are excellent platforms to realize twist-angle-independent ultra-low friction due to their weak interlayer van der Waals interactions and natural lattice mismatch. However, for finite-size interfaces, the effect of domain edges on the friction process remains unclear. Here we report the superlubricity phenomenon and the edge-pinning effect at MoS2/graphite and MoS2/hexagonal boron nitride van der Waals heterostructure interfaces. We found that the friction coefficients of these heterostructures are below 10−6. Molecular dynamics simulations corroborate the experiments, which highlights the contribution of edges and interface steps to friction forces. Our experiments and simulations provide more information on the sliding mechanism of finite low-dimensional structures, which is vital to understand the friction process of laminar solid lubricants. |
Organization Units (connected with the publication): | Computational Material Design | ISSN: | 1476-1122 | Publisher DOI: | 10.1038/s41563-021-01058-4 |
Appears in Collections: | 3 - Publication references (only metadata) |
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