Amide Bond‐Induced Charge‐Directed Transport: Constructing Capture‐Release Networks for Enhanced Electromagnetic Wave Attenuation

Abstract Precise modulation of the electronic structure of carbon remains a long‐standing challenge, severely limiting the controllable tuning of its conductive properties and polarization behavior. Herein, a composite (OC–DG–Fe 3 O 4 ) with a hierarchical π–σ–π architecture is engineered by modulating the surface‐state coordination of electron‐withdrawing/ electron‐donating carbon dots. The resultant amide linkages generate σ‐bond electron traps that facilitate localized polarization. Concurrently, they introduce mid‐gap states that enhance the localized carrier transport, thereby establishing an efficient “capture–release” network that dynamically balances polarization and conduction loss. Consequently, an ultrathin (only 1.39 mm thick) OC–DG–Fe 3 O 4 composite delivers an effective absorption bandwidth of 5.76 GHz, manifesting exceptional electromagnetic wave absorption and shielding capabilities. By establishing atomically resolved charge–structure correlations, this study elucidates the relationship among the electronic configuration, carrier transport, and dielectric/magnetic dipolar responses, providing guidance for modulation and applications of electronic structure.