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Scalable Solution-processed Fabrication Strategy for High-performance, Flexible, Transparent Electrodes with Embedded Metal Mesh

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Succulent-Inspired Implicit Structural Change for Smart "ON/OFF" Switchable and Flexible EMI Shielding Coating.

Chenxi Li¹, Donglei Li¹, Mingting Zhang¹

¹Department of Materials Science, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, People's Republic of China.

ACS Applied Materials & Interfaces

|March 4, 2024

Summary

This study introduces a novel smart switchable MXene coating film using reversible yolk-shell biomicrospheres for flexible electromagnetic interference shielding. The material demonstrates significant switchable shielding capabilities for advanced electronic applications.

Keywords:

flexible electromagnetic interference shielding coating smart emergency alert device succulent-inspired water-responsive biomicrospheres yolk−shell structure

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Area of Science:

Materials Science
Nanotechnology
Polymer Science

Background:

Miniaturized electronics require smart, flexible electromagnetic interference (EMI) shielding materials.
Existing switchable EMI shielding materials often rely on explicit structural changes.

Purpose of the Study:

To develop a novel switchable MXene coating film with inner implicit structural change for EMI shielding.
To utilize reversible large-cavity yolk-shell biomicrospheres for tunable shielding properties.

Main Methods:

Fabrication of novel yolk-shell biomicrospheres with a PNIPAM hydrogel core, switchable cavity, and p-PDA shell.
Integration of biomicrospheres into a MXene framework to create a WR-MXene coating film.
Characterization of the switchable shielding performance in the X band.

Main Results:

The WR-MXene coating film exhibits an ultralight and flexible nature.
Achieved a large switchable change of over 60 dB in EMI shielding.
Demonstrated extraordinary EMI shielding effectiveness, reaching 95 dB and over 50 dB in the X band.

Conclusions:

The developed succulent-inspired switchable coating films offer promising solutions for smart flexible wearable devices.
The novel reversible yolk-shell biomicrospheres enable dynamic real-time response in multifunctional systems.
This approach provides a new pathway for advanced EMI shielding materials with tunable properties.