title: Highly Efficient Microwave Absorption of Magnetic Nanospindle-Conductive Polymer Hybrids by Molecular Layer Deposition.
abstract: Oxidative molecular layer deposition (oMLD) was applied to fabricate conductive polymer-magnetic material core-shell microwave absorbers in this work. One dimensional Fe3O4-poly(3,4-ethylenedioxythiophene) (PEDOT) nanospindles with controllable PEDOT thickness were successfully synthesized. Their absorption performance was evaluated in the 2-18 GHz frequency range. With the advantage of oMLD, PEDOT shell thicknesses can be controlled precisely. Because the permittivity of Fe3O4-PEDOT nanospindles obviously increases while their permeability decreases slightly with the PEDOT cycles, the properties can be tuned effectively by only adjusting the PEDOT cycle number. With a proper PEDOT shell thickness, excellent reflection characteristics can be obtained. Remarkably high absorption strength (-55.0 dB at 16.2 GHz) and good absorption bandwidth (4.34 GHz less than -10 dB) were realized. Such excellent performance is better than that reported previously for most magnetic material-based absorbers. Considering the precise controllability and excellent absorption performance of the prepared microwave absorbers, we believe that oMLD is a facile synthetic route for microwave absorbers.
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Lili
authors.initials: L
authors.lastname: Yan
authors.affiliation: School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Xixi
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Shichao
authors.initials: S
authors.lastname: Zhao
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Yunqin
authors.initials: Y
authors.lastname: Li
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.
authors.forename: Zhe
authors.initials: Z
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhang
authors.affiliation: School of Material Science and Engineering, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Maosheng
authors.initials: M
authors.lastname: Cao
authors.affiliation: State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences , Taiyuan 030001, China.
authors.forename: Yong
authors.identifier: http://orcid.org/0000-0002-5567-1464
authors.initials: Y
authors.lastname: Qin
keywords: conductive polymer; electromagnetic parameters; magnetic materials; microwave absorption; oxidative molecular layer deposition