金界面处MXene薄片的纳米力学特性
Nanomechanics of MXene flakes at gold interfaces
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中文总结 AI 辅助
本研究通过原子力显微镜等技术表征Ti₃C₂Tₓ MXene薄片与金界面的纳米力学特性，明确其界面剪切应力、磨损及结晶性，为其在含金属界面的纳米能量收集系统中的应用奠定基础。
中文摘要 AI 辅助
新型自供电可持续电子设备的需求，要求大力开发适用于纳米应用的先进新材料。MXene因具备优异的电子和力学性能已受到关注，但其在类金属界面处的纳米力学响应仍未明确。本研究采用原子力显微镜表征自组装碳化钛MXene（Ti₃C₂Tₓ）薄薄片与金探针接触时的纳米力学特性，测得界面剪切应力为399 MPa，还观察到MXene薄片中心区域存在纳米磨损。透射电子显微镜和电子能量损失谱证实，摩擦膜中的MXene薄片仍保持结晶性。本研究结果为Ti₃C₂Tₓ在含金属界面的新型纳米能量收集系统（如摩擦伏打纳米发电机）中的应用奠定了基础，该系统在纳米电子学、可穿戴传感、电动汽车及机器人领域具有广阔前景。
英文摘要
The demand for novel self-powering and sustainable electronics requires major efforts in identifying new advanced materials for nano-applications. MXene have gathered attention due to their electronic and mechanical properties, however, their nanomechanical compliance against a metal-like interface is still not clearly identified. In this work, we employ atomic force microscopy to characterize the nanomechanical properties of a self-assembled thin flake of titanium carbide MXene (Ti3C2Tx) against a gold probe. The investigation returns an interfacial shear stress of 399 MPa, and the observation of nano-wear localized in the center of the MXene flake. Nevertheless, MXene flakes retained their crystallinity in the tribofilms as confirmed by transmission electron microscopy and electron energy loss spectroscopy. The outcomes of this work set the basis for the use of Ti3C2Tx in novel nano harvesting systems involving metal interfaces (e.g., tribovoltaic nanogenerators) with large scope in nanoelectronics, wearable sensing, electric vehicles, and robotics.
