Journal
SYNTHETIC METALS
Volume 275, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2021.116731
Keywords
Gradient honeycomb; Fe3O4 multi-granular nanoclusters; Multi-walled carbon nanotubes; Reflection loss; Metamaterials; X-band; Shielding effectiveness; 3D printing
Funding
- Khalifa University of Science and Technology. Abu Dhabi, UAE [CIRA-2019-063]
- National Research Foundation of Korea (NRF) South Korea [2019R1A2C3006587]
- National Research Foundation of Korea [2019R1A2C3006587] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Electromagnetic wave radiation can have adverse health effects on humans and disrupt the operations of nearby electronic devices. Developing new materials with strong wave absorption properties and being lightweight is of great technological interest worldwide. Research on the composite of Fe3O4 multi-granular nanoclusters and multi-walled carbon nanotubes shows promising results for electromagnetic shielding enhancement and the effect of tilted angle on reflection loss.
Electromagnetic wave radiation has adverse health effects on humans and can hamper nearby electronic devices? regular operations. Therefore, the need to develop new materials with a substantial wave absorption property, a broad absorption bandwidth in a wide incident angle, and lightweight is of enormous technological interest worldwide. Here we report the experimental frequency-dependent permittivity and permeability behaviors of the composite consisting of Fe3O4 multi-granular nanoclusters (MGNCs) and multi-walled carbon nanotubes (MWCNTs). We also apply the results for the starting point for the gradient honeycomb structure design and optimization. We study the effect of the tilted angle on the reflection loss (RL) by finite element analysis (FEM). We obtain a flat RL over the X-band for the regular honeycomb structure with a 0 degrees tilted angle. An increase in the tilted angle from 0 degrees to 4 degrees increases the RL, and a peak is formed at the maximum tilted angle of 4 degrees. Coating the regular honeycomb structure with a thin layer of MGNC/MWCNT enhances the electromagnetic shielding (EMI). Furthermore, as tilted angle increases for the coated honeycomb structure from 0 degrees to 4 degrees, SE increases dramatically over the frequency range from 8.2 to 12.4 GHz at incident wave angles of 0 degrees and 90 degrees.
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