Anisotropic Fracture of Two-Dimensional Ta2NiSe5

• DOI: 10.1021/acs.nanolett.4c01202
• Publication Date: 2024-04-30T13:56:56Z
• Authors: Binzhao Li; Jiahao Li; Wei Jiang; Yafei Wang; Dong Wang; Li Song; Yinbo Zhu; HengAn Wu; Guorui Wang; Zhong Zhang
• Keywords: Slippage

Anisotropic two-dimensional materials present a diverse range of physical characteristics, making them well-suited for applications in photonics and optoelectronics. While mechanical properties play crucial role determining the reliability efficacy 2D material-based devices, fracture behavior anisotropic crystals remains relatively unexplored. Toward this end, we herein first measurement toughness Ta2NiSe5 by microelectromechanical system-based tensile tests. Our findings reveal significant in-plane ratio (∼3.0), accounting crystal orientation-dependent crack paths. As thickness increases, observe an intriguing intraplanar-to-interplanar transition along a-axis, manifesting as stepwise features attributed to interlayer slippage. In contrast, ruptures c-axis surprisingly exhibit persistent straightness smoothness regardless thickness, owing robust shear resistance. work affords promising avenue construction future electronics based on nanoribbons with atomically sharp edges.