Microwave Absorption Properties of Carbon Nanocoils Coated with Highly Controlled Magnetic Materials by Atomic Layer Deposition

In this work, atomic layer deposition is applied to coat carbon nanocoils with magnetic Fe3O4 or Ni. The coatings have a uniform and highly controlled thickness. The coated nanocoils with coaxial multilayer nanostructures exhibit remarkably improved microwave absorption properties compared to the pr...

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Bibliographic Details
Published in:ACS nano 2012-12, Vol.6 (12), p.11009-11017
Main Authors: Wang, Guizhen, Gao, Zhe, Tang, Shiwei, Chen, Chaoqiu, Duan, Feifei, Zhao, Shichao, Lin, Shiwei, Feng, Yuhong, Zhou, Lei, Qin, Yong
Format: Article
Language:English
Subjects:
Absorption
Aluminum Oxide - chemistry
Carbon
Carbon - chemistry
Coating
Complex permittivity
Deposition
Dielectrics
Ferrosoferric Oxide - chemistry
Magnetic permeability
Microwave absorption
Microwaves
Multilayers
Nanoparticles - chemistry
Nanostructure
Nickel - chemistry
Permeability
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Summary:In this work, atomic layer deposition is applied to coat carbon nanocoils with magnetic Fe3O4 or Ni. The coatings have a uniform and highly controlled thickness. The coated nanocoils with coaxial multilayer nanostructures exhibit remarkably improved microwave absorption properties compared to the pristine carbon nanocoils. The enhanced absorption ability arises from the efficient complementarity between complex permittivity and permeability, chiral morphology, and multilayer structure of the products. This method can be extended to exploit other composite materials benefiting from its convenient control of the impedance matching and combination of dielectric–magnetic multiple loss mechanisms for microwave absorption applications.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn304630h