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Published on: June 23, 2017
Ultra‑Broadband and Ultra-High Electromagnetic Interference Shielding Performance of Aligned and Compact MXene Films
Weiqiang Huang1, Xuebin Liu1, Yunfan Wang1
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou, 510275, People's Republic of China.
A novel MXene film offers broadband stealth for aerospace equipment, achieving high electromagnetic interference shielding and low infrared emissivity. This single-material solution provides exceptional specific shielding effectiveness and electrothermal performance for enhanced protection.
Area of Science:
- Materials Science
- Nanotechnology
- Aerospace Engineering
Background:
- The development of advanced electronic detection necessitates broadband stealth solutions for aerospace equipment.
- Current broadband stealth relies on complex multi-layer coatings, presenting a challenge for single-material applications.
- Achieving effective stealth across microwave, terahertz, and infrared spectrums with a single material is a significant hurdle.
Purpose of the Study:
- To develop a compact, single-material solution for broadband stealth.
- To investigate the electromagnetic interference (EMI) shielding and infrared (IR) stealth capabilities of a novel MXene film.
- To evaluate the electrothermal performance of the MXene film for potential dual-use applications.
Main Methods:
- Fabrication of a compact MXene film with aligned nanosheets using a continuous centrifugal spraying strategy.
- Measurement of electromagnetic interference shielding effectiveness in gigahertz (GHz) and terahertz (THz) bands.
- Characterization of infrared emissivity across a wide infrared spectrum.
- Assessment of electrothermal performance, including saturated temperature and heating rate.
Main Results:
- The MXene film demonstrated exceptional EMI shielding effectiveness of 45 dB in the GHz band (8.2-40 GHz) and 59 dB in the THz band (0.2-1.6 THz) at a thickness of 2.25 μm.
- The film achieved a record-high specific shielding effectiveness of 1.545 × 10^6 dB cm² g⁻¹.
- Ultra-low infrared emissivity (0.1) was observed in the 2.5-16.0 μm band, indicating excellent IR stealth.
- Efficient electrothermal performance was confirmed with a saturated temperature over 120 °C and a heating rate of 4.4 °C s⁻¹ at 1.0 V.
Conclusions:
- The developed MXene film offers a promising single-material strategy for broadband stealth against multispectral electromagnetic interference.
- The film's high conductivity and unique nanostructure contribute to its superior EMI shielding and IR stealth capabilities.
- The demonstrated electrothermal properties suggest potential for integrated stealth and thermal management systems.
