Related Experiment Video
Updated: Jun 16, 2025
10:37
A Rapid Synthesis Method for Au, Pd, and Pt Aerogels Via Direct Solution-Based Reduction
Published on: June 18, 2018
8.7K
Multifunctional Asymmetric Bilayer Aerogels for Highly Efficient Electromagnetic Interference Shielding with
Cheng-Zhang Qi1,2, Peng Min3, Xinfeng Zhou1
1State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
Nano-Micro Letters
|June 12, 2025
Summary
New asymmetric bilayer aerogels offer superior electromagnetic interference (EMI) shielding by combining absorption and reflection. These multifunctional materials provide broadband absorption and tunable performance for diverse applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetics
Background:
- Growing demand for multifunctional electromagnetic interference (EMI) shielding materials with high absorption capabilities.
- Existing EMI shielding materials often exhibit high reflection and limited functionality.
- Need for advanced materials to address electromagnetic radiation pollution and multi-scenario applications.
Purpose of the Study:
- To design and develop multifunctional asymmetric bilayer aerogels for broadband absorption-dominated EMI shielding.
- To investigate the absorption-reflection-reabsorption mechanisms and interference cancellation effects.
- To explore the tunable absorption properties and multi-scenario applications of the novel aerogels.
Main Methods:
- Sequential printing of MXene-graphene oxide (MG) and conductive MXene layers.
- Utilizing MG emulsion ink and MXene ink for layer fabrication.
- Employing freeze-drying to create and solidify numerous pores within the aerogel structure.
- Finite element simulations to validate electromagnetic wave absorption effectiveness.
Main Results:
- Asymmetric bilayer aerogels achieved an average absorption coefficient of 0.95 in the X-band.
- Demonstrated tunable electromagnetic wave absorption across an ultrawide band (8.2–40 GHz).
- The top MG layer optimized impedance matching for re-absorption; the bottom MXene layer enhanced reflection.
- Aerogels exhibited hydrophobicity, thermal insulation, and Joule heating capabilities.
Conclusions:
- The designed asymmetric bilayer aerogels effectively achieve broadband absorption-dominated EMI shielding.
- These multifunctional aerogels show promise for applications in solar-thermal/electric heating, infrared stealth, and oil spill cleanup.
- The study presents a novel approach to developing advanced EMI shielding materials with enhanced performance and multiple functionalities.
