Ren Xiaoying, Mei Xuesong, Zhou Jingzhuo, Wang Xuewen, Wei Fengqi, Mei Huanhuan, Zhao Shijun, Lu Yang, Cui Jianlei
State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Shaanxi Key Laboratory of Intelligent Robots, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Adv Mater. 2024 Nov;36(48):e2408575. doi: 10.1002/adma.202408575. Epub 2024 Oct 14.
The high-efficiency and high-precision welding technology of Ag nanowires is of great engineering significance for the integration of new-generation micro- and nanodevices, and the mechanical behavior of its interconnect joints is also essential for their reliable application, especially for some flexible device. In this paper, based on the nano-focusing and localized plasma enhancement properties of Ag nanowires under laser irradiation, Ag nanowire self-limiting joints with mechanical and electrical properties comparable to those of the base material are obtained. At the same time, the local plasma enhancement characteristics of Ag nanowire joints are scanned and analyzed with nanoscale resolution by using cathodoluminescence technology, and the local multi-physical field coupling regulation mechanism of Ag nanowire joints induced by different laser parameters is systematically investigated by combining theoretical simulations. Meanwhile, based on the in situ laser welding and nanomechanical tensile experiments, the mechanical properties of single Ag nanowires and their welded joints are systematically analyzed, and the characteristics of the interfacial atomic behaviors and the evolution process during the welding and tensile processes are investigated.
银纳米线的高效高精度焊接技术对新一代微纳器件的集成具有重大工程意义，其互连接头的力学行为对其可靠应用也至关重要，特别是对于一些柔性器件。本文基于激光辐照下银纳米线的纳米聚焦和局部等离子体增强特性，获得了力学和电学性能与母材相当的银纳米线自限性接头。同时，利用阴极发光技术以纳米级分辨率扫描和分析银纳米线接头的局部等离子体增强特性，并结合理论模拟系统研究了不同激光参数诱导的银纳米线接头局部多物理场耦合调控机制。此外，基于原位激光焊接和纳米力学拉伸实验，系统分析了单根银纳米线及其焊接接头的力学性能，研究了焊接和拉伸过程中界面原子行为特征及演变过程。
