Electrochemical Switching of Electromagnetism by Hierarchical Disorder Tailored Atomic Scale Polarization

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(47)

Published: Oct. 7, 2024

Abstract High‐frequency electronic response governs a broad spectrum of electromagnetic applications from radiation protection, and signal compatibility, to energy recovery. Despite various efforts manage electric conductivity, dynamic control over dielectric polarization for real‐time modulation remains notable challenge. Herein, an electrochemical lithiation‐driven hierarchical disordering strategy is demonstrated actively modulating properties. The controllable formation diffusion coherent interfaces cation vacancies tailor the coupling atomic field thus locally polarized domains, which leads reversible transparency/absorption switching with tunable range −0.8–−20.4 dB reflection loss operation bandwidth 4.6 GHz. Compared traditional methods heteroatomic doping, hydrogenation, mechanical deformation, phase transition, shows larger regulation scope permittivity maximum increase ratios 260% 1950% real imaginary parts, respectively. This enables construction device architectures including adaptive window pixelated metasurface. results offer opportunities achieve intelligent devices pave avenue rejuvenate functions semiconductive oxides.

Language: Английский

Emodin Enhanced Microwave‐Responsive Heterojunction with Powerful Bactericidal Capacity and Immunoregulation for Curing Bacteria‐Infected Osteomyelitis

Advanced Science, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Eradication of osteomyelitis caused by bacterial infections is still a major challenge. Microwave therapy has the inherent advantage deep penetration in curing tissue infections. However, antibacterial efficiency sensitizers limited weak energy microwaves. Here, hybrid heterojunction system (Fe 3 O 4 /CuS/Emo) designed for bacterially infected osteomyelitis. As an enhanced microwave sensitizer, it shows supernormal response ability. Specifically, Fe acts as matrix to mediate magnetic loss. After CuS loading, heterogeneous interface forms induce significant interfacial polarization, which increasing dielectric On basis formed two semiconductors, emodin innovatively introduced modify it. This integration not only accelerates movement charge carriers but also enhances polarization loss due numerous functional groups present on surface. further optimizes thermal and catalytic response. In addition, unique anti‐inflammatory properties confer ability regulate immune microenvironment. vivo studies reveal that modified programmed elimination bacteria regulation It offers revolutionary approach treatment

Language: Английский

Microwave-responsive two-dimensional materials for microwave therapy of deep tissue diseases

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158306 - 158306

Published: Dec. 1, 2024

Language: Английский