Investigating the pinhole effect on the mechanical properties of biphenylene

M Samadian and M Ajri and A Azizi and MA Hemmatpour-Khotbesara, APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 129, 826 (2023).

DOI: 10.1007/s00339-023-07112-z

Monolayer biphenylene, a planar material composed of a solitary layer of biphenylene molecules, has garnered considerable interest owing to its extraordinary electromechanical characteristics. Moreover, investigating biphenylene networks featuring pinhole defects has become increasingly prominent in materials science due to their distinctive properties. These pinhole defects whose size, shape, and distribution can be meticulously regulated can be created via various fabrication methods to generate customized electromechanical properties suitable for specific applications. Thus, research on biphenylene networks with pinhole defects constitutes a crucial area of exploration in materials science and nanotechnology, with the potential to propel advancements in numerous technological fields. Herein, the effect of defects and pinholes and strain rate on the directional properties of biphenylene nanosheets (BPN) was investigated using molecular dynamic and density function theory simulations. Furthermore, Young's modulus and ultimate stress were investigated as two main parameters expressing mechanical properties. The results show that the BPN has more strength in the zigzag direction than in the armchair direction. Moreover, the presence of several symmetrical pinholes compared to one pinhole with the same area leads to a more significant reduction in mechanical strength.

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