Nondestructive 3D Imaging of Microscale Damage inside Polymers—Based on the Discovery of Self‐Excited Fluorescence Effect Induced by Electrical Field (Adv. Sci. 25/2023)

Nondestructive 3D Imaging of Microscale Damage In article number 2302262, Potao Sun, and co-workers report for the self-excited fluorescence of a microscale-damaged microchannel inside a polymer under the influence of an electric field. The imaging results present the spatial development morphology of electrical trees inside the polymer. This work aids in the precision imaging-guided structural design of dielectrics and have practical application potential in extreme environments.