Owing to the atomic scale thickness and the unpresedented physical properties, two-dimensional (2D) materials, especially graphene, have recently attracted dramatically increasing interests in interdisciplinary areas of physics, chemistry, materials and so on. To date, significant progresses have been achieved in developments of synthesis methods, structural characterizations, and a variety of fascinating applications, endowing 2D materials with a bright prospect in fields of micro-/nano-eletromechanical systems (MEMS/NEMS), photoelectric devices and functional composite materials. However, due to the unique structure and dimension of 2D materials, the fundamental understanding of its physical issues still remains elusive, especially for the mechanical characterization that faces vexing challenges yet. This paper systematically provides an overview of recent developments in the mechanical testing and characterization techniques on the intrinsically mechanical properties as well as the interfacial behaviors of 2D materials at micro-/nanoscale, such as nanoindentation test, bubbling test, etc. In addition, possible factors that may influence the mechanical performance of 2D materials are also discussed in detail and the underlying mechanisms are analyzed to enable the moderate physical and chemical design for the rationally modified properties. |