Since it has been shown that the electronic properties of the multilayer Ti₂CO₂ can be efficiently manipulated by strain and that the multilayer configurations could be applied in strain sensors, more MXene materials deserve further investigations based on their excellent performance and a wide range of potential applications. In this work, the theoretical study on the electronic characteristics of different MXene multilayer structures under strains is carried out using first principles calculations. The calculation results show that Ti₂CF₂ and Ti₂C(OH)₂ remains metallic under different strains, and thus the oxygen terminated Ti₂C MXene might be more suitable for application in pressure sensing devices. Moreover, strain stress curves and electronic structures under strains are calculated. From the results, the conversion from semiconductors to metals for Hf₂CO₂ and Zr₂CO₂ is determined to be allowed under compressive strains. Therefore, the current in a device can be more readily controlled using Hf₂CO₂ and Zr₂CO₂ than Nb₂CO₂ and V₂CO₂ under pressures in an appropriate range. It is expected that the current study can provide new clues for expanding the potential applications of MXenes such as in pressure sensors and flexible electronic devices.

由于已经显示出可以通过应变有效地控制多层Ti ₂ CO ₂的电子性能，并且可以将多层配置应用于应变传感器，因此更多的MXene材料因其出色的性能和广泛的应用而值得进一步研究。潜在的应用。在这项工作中，使用第一性原理计算对不同MXene多层结构在应变下的电子特性进行了理论研究。计算结果表明，Ti ₂ CF ₂和Ti ₂ C（OH）₂在不同的应变下仍保持金属状态，因此氧封端的Ti ₂C MXene可能更适用于压力感测设备。此外，计算了应变下的应力曲线和电子结构。根据该结果，确定在压缩应变下允许Hf ₂ CO ₂和Zr ₂ CO ₂从半导体到金属的转化。因此，与Nb ₂ CO ₂和V ₂ CO ₂相比，使用Hf ₂ CO ₂和Zr ₂ CO ₂可以更容易地控制设备中的电流。在适当范围内的压力下。预期当前的研究可以为扩展MXene的潜在应用提供新的线索，例如在压力传感器和柔性电子设备中。