Bamboo-Based Carbon/Co/CoO Heterojunction Structures Based on a Multi-Layer Periodic Matrix Array Can Be Used for...

Area of Science:

• Materials Science
• Nanotechnology
• Biomass Engineering

Background:

• Increasing electromagnetic radiation from electronic devices poses environmental and health concerns.
• Lightweight, porous carbon-based materials are crucial for effective electromagnetic radiation shielding.
• Developing advanced materials from sustainable resources like biomass is a key research area.

Purpose of the Study:

• To design and fabricate a green biomass carbon-based interface heterojunction for electromagnetic radiation protection.
• To investigate the magnetic and dielectric coupling within an anisotropic heterojunction structure.
• To optimize electromagnetic loss characteristics and radar cross-section reduction.

Main Methods:

• Constructed an anisotropic heterojunction using a honeycomb-like periodic matrix multi-layer array.
• Utilized bamboo as a biomass precursor, removing lignin to enhance pore structure.
• Employed in situ pyrolysis to form electric dipoles and carbon skeleton.
• Evaluated electromagnetic wave absorption and radar cross-section reduction through experimental measurements and simulations.

Main Results:

• Achieved excellent impedance matching due to enhanced interface polarization, relaxation, and local carrier traps.
• The bamboo-based carbon composite demonstrated significant electromagnetic loss characteristics.
• Attained an effective absorption bandwidth of 5.1 GHz at 1.55 mm thickness.
• Reached a minimum reflection loss of -54.7 dB and a radar cross-section reduction of 33.3 dB·m².

Conclusions:

• The developed bamboo-derived carbon multiphase composite is a highly effective electromagnetic radiation shielding material.
• The design strategy of magnetic and dielectric coupling in periodic array structures shows promise for advanced metamaterials.
• This research offers a sustainable approach for biomass utilization in electromagnetic shielding applications.