Enhanced microwave absorption properties of Fe nanotubes fabricated by a facile gas bubble-engaged assembly technique

Author

Guoxiu Tong ; Mi Hong ; Jianguo Guan ; Jinhao Yuan ; Wenhua Wu ; Haisheng Qian

Author_Institution

Coll. of Chem. & Life Sci., Zhejiang Normal Univ., Jinhua, China

Volume

6

Issue

8

fYear

2011

fDate

8/1/2011 12:00:00 AM

Firstpage

722

Lastpage

724

Abstract

Electromagnetic (EM) characteristics of polymorphic Fe nanotubes (INTs) fabricated by a facile gas bubble-engaged assembly technique were studied at 2-18-GHz. The Fe²⁺ concentration was varied to modulate the tube structure, the characteristics of which are closely related to its resulting microwave absorption properties. INTs with large aspect ratios, thick tube walls and small inner diameters were easy to produce at high Fe²⁺ concentrations. They showed a strong absorption peak of -22.4 dB at 10.4 GHz and a bandwidth (≤-10-DBR) of 12 GHz because of proper EM matching and high dielectric loss.

Keywords

dielectric losses; iron compounds; microwave materials; microwave spectra; nanofabrication; nanotubes; polymorphism; EM matching; Fe²⁺ concentration; absorption peak; aspect ratio; bandwidth; electromagnetic characteristics; frequency 2 GHz to 18 GHz; gas bubble-engaged assembly technique; high dielectric loss; inner diameters; microwave absorption property enhanced; polymorphic Fe nanotubes; tube structure; tube walls;

fLanguage

English

Journal_Title

Micro & Nano Letters, IET

Publisher

iet

ISSN

1750-0443

Type

jour

DOI

10.1049/mnl.2011.0316

Filename

6013024