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Morphology engineering of defective graphene for microwave absorption
1School of Mathematics and Physics, Jiangsu University of Technology, Changzhou 213001, China.
Journal of Colloid and Interface Science
|March 9, 2023
Summary
Defective graphene
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Defective graphene is a lightweight material for electromagnetic applications.
- The electromagnetic response of defective graphene with different structures is not well understood.
Purpose of the Study:
- To investigate how the morphology of defective graphene affects microwave attenuation.
- To compare the performance of two-dimensional planar structure (2D-ps) and three-dimensional continuous network (3D-cn) defective graphene.
Main Methods:
- Designing 2D-ps and 3D-cn defective graphene within polymeric matrices.
- Analyzing the relationship between graphene topology and microwave absorption properties.
Main Results:
- 3D-cn defective graphene achieved broadband microwave absorption at ultralow filling content due to pore structures enhancing impedance matching and scattering.
- 2D-ps defective graphene showed good microwave absorption at low frequency and thickness, driven by dielectric losses from charge transport and defects.
Conclusions:
- Morphology engineering of defective graphene significantly impacts microwave absorption performance.
- This study provides insights for designing high-performance graphene-based microwave absorbers.
