Sn Whiskers from Ti₂SnC Max Phase: Bridging Dual-Functionality in Electromagnetic Attenuation

Area of Science:

• Materials Science
• Electromagnetics
• Nanotechnology

Background:

• Growing demand for multifunctional electromagnetic (EM) attenuating materials in complex EM environments.
• 1D metals show promise for EM attenuation due to high conductivity and electron migration networks.
• Current limitations in achieving dual electromagnetic interference (EMI) shielding and microwave absorption (MA) applications.

Purpose of the Study:

• To investigate Sn whiskers derived from the Ti2SnC MAX phase for dual EMI shielding and MA.
• To explore the relationship between material structure, conductivity, and EM attenuation properties.
• To provide a pathway for developing multifunctional EM attenuating materials.

Main Methods:

• Synthesis of Sn whiskers from Ti2SnC MAX phase.
• Characterization of EM shielding and microwave absorption properties.
• Analysis of conductive networks and interfacial polarization using off-axis electron holography.

Main Results:

• Achieved minimum reflection loss of -44.82 dB at lower loading ratios.
• Demonstrated efficient EMI shielding effectiveness of 42.78 dB at higher loading ratios.
• Identified tunable conductive networks and enhanced interfacial polarization at Sn/SnO2 interfaces as key performance factors.

Conclusions:

• Sn whiskers from Ti2SnC MAX phase exhibit exceptional dual EMI shielding and MA capabilities.
• Adjustable conductive networks and interfacial polarization are crucial for performance.
• This study offers a scalable and environmentally friendly approach to multifunctional EM attenuating materials.