Microwave absorption properties of carbon nanocoils coated with highly controlled magnetic materials by atomic layer deposition

Guizhen Wang, Zhe Gao, Shiwei Tang, Chaoqiu Chen, Feifei Duan, Shichao Zhao, Shiwei Lin, Yuhong Feng, Lei Zhou, Yong Qin

Research output: Contribution to journalArticlepeer-review

774 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)11009-11017
Number of pages9
JournalACS Nano
Volume6
Issue number12
DOIs
StatePublished - 21 Dec 2012
Externally publishedYes

Keywords

  • atomic layer deposition
  • carbon nanocoils
  • core-shell nanostructures
  • magnetic materials
  • microwave absorption

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