提出了一种利用铁电偶极子提高摩擦发电机表面电荷密度的方法。利用聚偏氟乙烯(PVDF)的铁电特性，在摩擦电层形成正电荷陷阱，增强摩擦电材料的发电性能，从而提高摩擦电纳米发电机的表面电荷密度。采用铸造工艺和单轴拉伸工艺制备了PVDF薄膜，并将其集成到具有垂直分离结构的摩擦电纳米发电机中。系统地研究了PVDF膜的埋置方向、厚度和极化强度对摩擦纳米发电机输出功率的影响。结果表明，当压电膜厚度为100 μm，最大极化电场为90 MV/m时，摩擦电纳米发电机的峰值功率提高了2.6倍。这项工作为调节摩擦电纳米发电机的性能提供了新的见解。The Influence of Ferroelectric Dipoles on the Output Performance of Triboelectric

Two-dimensional (2D) Te nanosheets were successfully fabricated through the liquid-phase exfoliation (LPE) method. The nonlinear optical properties of 2D Te nanosheets were studied by the open-aperture Z-scan technique. Furthermore, the continuous wave mode-locked Nd:YVO₄ laser was successfully realized by using 2D Te as a saturable absorber (SA) for the first time, to the best of our knowledge. Ultrashort pulses as short as 5.8 ps were obtained at 1064.3 nm with an output power of 851 mW. This primary investigation indicates that the 2D Te SA is a promising photonic device in the fields of ultrafast solid-state lasers.