A Self‐Adhesive Flexible Ultrawide‐Bandwidth Triboelectric Ultrasonic Transducer for Non‐Destructive Testing of Complex Industrial Structures. - Si, Shaobo; Luo, Yan; Huang, Juncheng; Pan, Xiaosen; Yi, Tao; Wang, Xueying; Tang, Ge; Wang, Lei; Sun, Xiangyu; Xing, Zhanqiang; Ji, Weiliang; Sun, Chenchen; et al. (Advanced Functional Materials, 2026)