Abstract Nanoindentation has been widely adopted for mechanical properties characterization of two-dimensional (2D) materials, where one typically starts with measuring the indentation load-displacement relationship of a selected 2D material, either free-standing or on a substrate, and then fits the result to an analytical model to extract the elastic modulus and strength of the material. However, the existing indentation models were not originally intended to be used for atomically thin materials, which has led to some controversies and confusion in the field. There is now an urgent need to develop new analytical models capable of describing the indentation response of 2D materials for accurate characterization of their mechanical properties. Here, we review recent progress in this field to identify existing issues and opportunities for future studies.

中文翻译：

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通过纳米压痕实验表征二维材料的力学性能

摘要 纳米压痕已被广泛用于二维 (2D) 材料的机械性能表征，其中通常首先测量选定的 2D 材料的压痕载荷 - 位移关系，无论是独立的还是在基板上，然后拟合结果到分析模型以提取材料的弹性模量和强度。然而，现有的压痕模型最初并不打算用于原子级薄的材料，这导致了该领域的一些争议和混乱。现在迫切需要开发能够描述 2D 材料的压痕响应的新分析模型，以准确表征其机械性能。这里，