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A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor
Min Zhang1, Chen Han1, Wen-Qiang Cao1
1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, People's Republic of China.
Nano-Micro Letters
|June 17, 2021
Summary
Researchers developed a novel NiCo2O4 nanofiber material that achieves both efficient electromagnetic (EM) absorption and green shielding. This breakthrough material also demonstrates strain sensing capabilities, opening new avenues for multifunctional EM devices.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetism
Background:
- Achieving simultaneous electromagnetic (EM) absorption and green shielding in a single material is challenging due to competing loss mechanisms.
- Existing EM functional materials often prioritize one function over the other, limiting their applicability.
Purpose of the Study:
- To engineer a novel material with integrated EM absorption, green shielding, and strain sensing functions.
- To explore the relationship between electron transport characteristics and EM attenuation.
- To develop a new sensing mechanism based on EM attenuation and resonance coupling.
Main Methods:
- Nano-micro engineering of NiCo2O4 nanofibers to tailor internal structure and charge transport.
- Investigating EM absorption and shielding effectiveness by varying conductivity.
- Designing a strain sensor utilizing the material's EM properties and resonance coupling.
Main Results:
- Successfully synthesized NiCo2O4 nanofibers exhibiting both EM absorption and green shielding.
- Demonstrated a tunable performance transition from EM absorption to shielding, and coexistence of both functions, by enhancing conductivity.
- Achieved a reflection loss reduction from -52.72 to -10.5 dB and EM interference shielding effectiveness up to 13.4 dB.
- Developed a strain sensor based on the patterned NiCo2O4 structure and EM resonance coupling.
Conclusions:
- Electron transport properties significantly influence EM attenuation and can be generalized to other EM functional materials.
- The developed NiCo2O4 nanofiber represents a multifunctional EM material with potential for advanced applications.
- The strategies employed for tuning EM performance and device construction are applicable to a broader range of EM functional materials.
