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Janus Nanostructures Enabled by Confined Interfacial Engineering for Enhanced Electromagnetic Response
Limeng Song1,2, Cheng Song1, Feiyue Hu3
1School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou, P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|August 6, 2026
Summary
Researchers engineered asymmetric nano-interfaces in SiC@C Janus hollow nanostructures for advanced microwave absorption. This breakthrough offers superior electromagnetic shielding with ultralow filler loading, paving the way for next-generation materials.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Interfacial design is crucial for regulating electromagnetic responses.
- Precise construction and mechanism understanding of asymmetric nano-interfaces at the nanoscale are underexplored.
Purpose of the Study:
- To develop a strategy for constructing well-defined asymmetric nano-interfaces in carbon-based microwave absorbers.
- To investigate the mechanism by which these interfaces regulate electromagnetic functionality.
Main Methods:
- Confined diffusion-mediated interfacial engineering strategy.
- Construction of SiC@C Janus hollow nanostructures.
- Theoretical analysis, electromagnetic simulations, and multiscale characterizations.
Main Results:
- Achieved minimum reflection loss of -62.36 dB and effective absorption bandwidth of 7.82 GHz at 10 wt.% filler loading.
- Demonstrated pronounced radar cross-section reduction.
- Revealed that asymmetric Janus interfaces enhance impedance matching via dielectric modulation.
Conclusions:
- Asymmetric Janus nano-interfaces synergistically enhance electromagnetic energy dissipation through multiple reflections, scattering, and interfacial polarization.
- Established a general paradigm of confined interfacial engineering for high-performance electromagnetic protection materials.
- Provided nanoscale insights into electromagnetic modulation mechanisms governed by asymmetric interfaces.
