title: Strong Electromagnetic Wave Response Derived from the Construction of Dielectric/Magnetic Media Heterostructure and Multiple Interfaces.
abstract: A novel yolk-shell structure of cobalt nanoparticle embedded nanoporous carbon@carbonyl iron (Co/NPC@Void@CI) was synthesized via metal organic chemical vapor deposition (MOCVD) and subsequent calcination treatment. The in situ generation of void layer, which originated from the shrink of a Co-based zeolitic imidazolate framework (ZIF-67) during carbonization, embodies distinct advantage compared to the conventional template method. Thanks to the introduction of custom-designed dielectric/magnetic media heterostructure and multiple interfaces, the composites filled with 40 wt % of Co/NPC@Void@CI samples in paraffin exhibit a maximum reflection loss of -49.2 dB at 2.2 mm; importantly, a broad absorption bandwidth (RL < -10 dB) of 6.72 GHz can be obtained, which covers more than one-third of the whole frequency region from 10.56 to 17.28 GHz. This study not only develops the application of carbonyl iron as a high-efficiency light absorber but also initiates a fire-new avenue for artificially designed heterostructures with target functionalities.
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Bin
authors.initials: B
authors.lastname: Quan
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Liang
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Guangbin
authors.identifier: http://orcid.org/0000-0002-5150-3949
authors.initials: G
authors.lastname: Ji
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Jianna
authors.initials: J
authors.lastname: Ma
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Peiyi
authors.initials: P
authors.lastname: Ouyang
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: He
authors.initials: H
authors.lastname: Gong
authors.affiliation: College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics , Nanjing 211100, P. R. China.
authors.forename: Guoyue
authors.initials: G
authors.lastname: Xu
authors.affiliation: Laboratory of Solid State Microstructures, Nanjing University , Nanjing 210093, P. R. China.
authors.forename: Youwei
authors.initials: Y
authors.lastname: Du
keywords: carbonyl iron; electromagnetic wave absorbing; heterostructure; multiple interfaces; yolk−shell