High-permittivity Sb2S3 single-crystal nanorods as a brand-new choice for electromagnetic wave absorption

The application of antimony sulfide (Sb 2 S 3 ) has been limited mainly to the energy storage and photoelectric conversion fields. However, in this work, the application of Sb 2 S 3 is extended to the field of electromagnetic (EM) wave absorption for the first time. High-permittivity Sb 2 S 3 single-crystal nanorods were prepared successfully and exhibited excellent performance, with a low reflection loss of −65.9 dB (13.0 GHz, 3.8 mm) and an ultra-wide effective absorption bandwidth of 9.5 GHz (8.5–18.0 GHz, 4.1 mm). After excluding the general absorption mechanisms, including conductive losses, interfacial polarization, and dipole polarization, the distinctive single-crystal volume polarization affected by shape anisotropy was proposed. This work not only meets the challenge of a single-component dielectric material design but also introduces a new concept for construction of efficient dielectric EM wave absorption material.