Gang Li , Ruiyang Tan , Bohong Gao , Yuting Zhou , Chengcheng Zhang , Ping Chen , Xinyi Wang
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引用次数: 0
Abstract
Prussian blue analog (PBA) derivatives are widely utilized as high-performance electromagnetic wave absorption (EMWA) materials. Despite their potential, the specific impact of different metal ions on the morphology and EMWA performance of 3d-4f PBAs has remained unclear. Herein, using a coprecipitation method and different transition metal ions, we synthesized DyM(CN)6 (M = Fe, Co) PBAs of different morphologies: six-petal flower-like structure for DyFe(CN)6 and an elliptical seed shape for DyCo(CN)6. Upon annealing, Dy2O3/Fe@CNT and Dy2O3/Co@CNT composites (CNT = carbon nanotube) maintaining their original shapes were prepared. The Dy2O3/Co@CNT composite, in particular, showed excellent EMWA properties with an RLmin of −48.32 dB at 15.44 GHz and an EAB of 5.68 GHz at an ultrathin thickness of only 1.75 mm. This performance is attributed to optimized impedance matching and synergistic magnetic-dielectric effects, along with interfacial polarization from Dy2O3, Co, and CNT interfaces. The simulated radar cross-section (RCS) confirms the excellent EMW attenuation capability of Dy2O3/Co@CNT and shows immense potential for practical application. This work offers a new approach to developing high-performance EMWA materials of 3d-4f PBA derivatives.
期刊介绍:
The journal Carbon is an international multidisciplinary forum for communicating scientific advances in the field of carbon materials. It reports new findings related to the formation, structure, properties, behaviors, and technological applications of carbons. Carbons are a broad class of ordered or disordered solid phases composed primarily of elemental carbon, including but not limited to carbon black, carbon fibers and filaments, carbon nanotubes, diamond and diamond-like carbon, fullerenes, glassy carbon, graphite, graphene, graphene-oxide, porous carbons, pyrolytic carbon, and other sp2 and non-sp2 hybridized carbon systems. Carbon is the companion title to the open access journal Carbon Trends. Relevant application areas for carbon materials include biology and medicine, catalysis, electronic, optoelectronic, spintronic, high-frequency, and photonic devices, energy storage and conversion systems, environmental applications and water treatment, smart materials and systems, and structural and thermal applications.