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

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• 作者：Guizhen Wang ; Zhe Gao ; Shiwei Tang ; Chaoqiu Chen ; Feifei Duan ; Shichao Zhao ; Shiwei Lin ; Yuhong Feng ; Lei Zhou ; Yong Qin
• 刊名：ACS Nano
• 出版年：2012
• 出版时间：December 21, 2012
• 年：2012
• 卷：6
• 期：12
• 页码：11009-11017
• 全文大小：696K
• 年卷期：v.6,no.12(December 21, 2012)
• ISSN：1936-086X

文摘

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鈥搈agnetic multiple loss mechanisms for microwave absorption applications.

Keywords:

atomic layer deposition; carbon nanocoils; core鈭抯hell nanostructures; magnetic materials; microwave absorption