Ouyang Wengen, Hod Oded, Urbakh Michael
Department of Engineering Mechanics, School of Civil Engineering, Wuhan University, Wuhan, Hubei 430072, China.
Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science, Tel Aviv University, Tel Aviv 6997801, Israel.
ACS Appl Mater Interfaces. 2021 Sep 15;13(36):43533-43539. doi: 10.1021/acsami.1c09529. Epub 2021 Sep 5.
Peeling of layered materials from supporting substrates, which is central for exfoliation and transfer processes, is found to be dominated by lattice commensurability effects in both low and high velocity limits. For a graphene nanoribbon atop a hexagonal boron nitride surface, the microscopic peeling behavior ranges from stick-slip, through smooth-sliding, to pure peeling regimes, depending on the relative orientation of the contacting surfaces and the peeling angle. The underlying mechanisms stem from the intimate relation between interfacial registry, interlayer interactions, and friction. This, in turn, allows for devising simple models for extracting the interfacial adhesion energy from the peeling force traces.
从支撑衬底上剥离层状材料是剥离和转移过程的核心，研究发现，在低速和高速极限情况下，这一过程都受晶格适配效应主导。对于位于六方氮化硼表面上的石墨烯纳米带，微观剥离行为从粘滑、平滑滑动到纯剥离状态不等，这取决于接触表面的相对取向和剥离角度。其潜在机制源于界面配准、层间相互作用和摩擦之间的紧密关系。反过来，这使得我们能够设计简单模型，从剥离力曲线中提取界面粘附能。
