Title :
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
fDate :
8/1/2011 12:00:00 AM
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;
Journal_Title :
Micro & Nano Letters, IET
DOI :
10.1049/mnl.2011.0316
