Succulent-Inspired Implicit Structural Change for Smart “ON/OFF” Switchable and Flexible EMI Shielding Coating
Source abstract
Abstract
Modern miniaturized intelligent electronics call for smart switchable and flexible electromagnetic interference (EMI) shielding material for highly precise applications. However, most switchable EMI shielding materials are based on an explicit structural change. Herein, we report a succulent-inspired smart switchable MXene (WR-MXene) coating film realized by inner implicit structural change, which benefits from the insertion of our reversible large-cavity yolk–shell biomicrospheres. The novel switchable yolk–shell biomicrospheres contain a soft N -isopropylacrylamide (PNIPAM) hydrogel core, an “ON/OFF” switchable cavity (over 30% volume fraction), and a porous polydopamine (p-PDA) shell. The yolk–shell biomicrospheres can be obtained by a facile two-step polymerization and a simple drying-dehydration treatment. Because of the “ON/OFF” switchable void space brought by the smart biomicrospheres and conductive framework of MXene, an optimized ultralight and flexible WR-MXene coating film (vWR-coating film) showed both large switchable change (over 60 dB) and extraordinary EMI shielding effectiveness, reaching 95 and over 50 dB in the whole X band (8.2–12.4 GHz). These novel reversible yolk–shell biomicrospheres and the succulent-inspired switchable coating films are promising for smart flexible wearable devices and many advanced multifunctional systems needing dynamic real-time response.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Electromagnetic wave absorption materials · MXene and MAX Phase Materials · Advanced Antenna and Metasurface Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Materials Science, Advanced Coatings Research Center of Ministry of Education of China, Fudan University, Shanghai 200433, People’s Republic of China
Key Laboratory for Information Science of Electromagnetic Waves, School of Information Science and Technology, Fudan University, Shanghai 200438, People’s Republic of China
Department of Light Sources and Illuminating Engineering, Fudan University, Shanghai 200438, People’s Republic of China
Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and Perception, Department of Materials Science, Institute of Optoelectronics, Fudan University, Shanghai 200433, People’s Republic of China
Funding
National Key Research and Development Program of China
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