金属薄膜新结构让柔性器件更耐用

Core Insights - The research team led by academician Sun Jun from Xi'an Jiaotong University has proposed an innovative design strategy called "coherent gradient nanolayered structure" to enhance the fatigue resistance of metal multilayer films, providing a new solution for the long-term service of flexible conductors [3][4] - Flexible electronic technology has broad application prospects in aerospace, human-computer interaction, biomedical, and clean energy fields, with metal films being critical conductive materials [3] - Traditional nano-crystalline metal films face fatigue issues due to cyclic deformation, leading to premature crack initiation and rapid propagation, which ultimately results in a sharp increase in resistance and potential circuit failure [3] Summary by Sections - Research Findings - The coherent gradient nanolayered structure significantly improves the comprehensive fatigue resistance of metal films compared to previously reported materials, achieving a synergistic enhancement of both high-cycle and low-cycle fatigue performance [3] - The design maintains high conductivity and good electrical ductility, similar to pure silver films, and is compatible with existing microfabrication technologies, indicating strong industrial application potential [4] - Applications - The research team has developed prototype devices including implantable bioelectrodes, flexible light-emitting displays, and flexible interconnect circuits, validating the feasibility of the conductive material in various cutting-edge fields [4] - This advancement is expected to address the long-term reliability bottleneck of flexible electronics, promoting deeper applications and widespread adoption in medical health, human-computer interaction, and intelligent sensing [4]