Controlling the electric permittivity of honeycomb-like core–shell Ni/CuSiO₃ composite nanospheres to enhance microwave absorption properties

Abstract

Controlling impedance matching and enhancing absorption properties are crucial for developing next-generation microwave absorbing materials.

Core–Shell Nanomaterials for Microwave Absorption and Electromagnetic Interference Shielding: A Review

“…The nanospheres with a shell thickness of about 30 nm significantly enhanced microwave absorption performance when composited with wax. The wax composite showed strong reflection loss of −39.5 dB at 9.6 GHz for the absorber thickness of 2.5 mm, having an effective absorbing bandwidth of 4.8 GHz (7.8–12.6 GHz) . Liu et al reported hierarchical hollow CuS@CoS 2 nanoboxes with double shells.…”

“…The wax composite showed strong reflection loss of −39.5 dB at 9.6 GHz for the absorber thickness of 2.5 mm, having an effective absorbing bandwidth of 4.8 GHz (7.8−12.6 GHz). 161 Liu et al reported hierarchical hollow CuS@CoS 2 nanoboxes with double shells. These unique nanostructures were designed by a template-assisted process inspired by Pearson's hard and soft acid−base (HSAB) principle.…”

Recent advancements in the electromagnetic interference shielding performance of nanostructured materials and their nanocomposites: a review

“…447,448 The formation of the core@shell could be an efficient route for developing the chemical homogeneity, oxidation stability, surface modification, dispersibility, enhanced functionality of the shell and the formation of a hollow morphology through the controlled release of the core. 449–507 In view of this, several reports on binary and ternary nanocomposites are reviewed below to explore the role of the unique features of the core@shell morphology in EMI shielding applications.…”

“…472 Fe@SiO 2 , 473 CoNi@C, 474 FeCo@SiO 2 , 475 FeCo@TiO 2 , 475 FeCo@SiO 2 @TiO 2 (ref. 475) CNS@MnO 2 , 476 cotton-derived carbon fibers@nano Cu, 477 Co@CoO, 478 and Ni@CuSiO 3 , 479 have also been investigated for their electromagnetic interference shielding and microwave absorption performances.…”