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Updated: Apr 1, 2026
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
16.0K
Regulating Local Coordination Environment of Single-Atom Co Absorbers for Dielectric-Magnetic Dual Loss Modulation
Xiao Liu1,2, Yongxin Qian1,2, Lei Yu1,2
1Institute of Electromagnetic Protection Materials and Spectral Innovation Technology, State Key Laboratory of Tropic Ocean Engineering Materials and Materials Evaluation, School of Materials Science and Engineering, Hainan University, Haikou, Hainan, China.
Advanced Materials (Deerfield Beach, Fla.)
|March 31, 2026
Summary
Researchers engineered cobalt single-atom (Co-SA) absorbers for enhanced electromagnetic wave absorption (EWA). Atomic coordination optimized dielectric and magnetic losses, achieving superior EWA performance.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetism
Background:
- Single-atom materials offer unique insights into electromagnetic energy dissipation.
- Optimizing local electronic states for collaborative dielectric-magnetic losses in absorbers is underexplored.
Purpose of the Study:
- To investigate dipole-spin synergistic regulation in cobalt single-atom (Co-SA) absorbers.
- To achieve enhanced electromagnetic wave absorption (EWA) through atomic-scale coordination engineering.
Main Methods:
- Atomic-scale coordination engineering of cobalt single atoms.
- Experimental and theoretical analyses of dielectric and magnetic loss mechanisms.
- Characterization of electromagnetic wave absorption performance.
Main Results:
- Asymmetric coordination enhanced dipole polarization and dielectric loss.
- A low-spin to high-spin transition increased magnetic moment and magnetic loss.
- Achieved a minimum reflection loss of -54.87 dB and an effective absorption bandwidth of 5.36 GHz.
Conclusions:
- Dipole-spin synergistic regulation in Co-SA absorbers leads to superior EWA.
- Atomic coordination environment significantly influences EWA performance.
- Demonstrated a scalable approach for designing high-performance EWA materials.
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