Heterostructured Nanorings of Fe-Fe3O4@C Hybrid with Enhanced Microwave Absorption Performance

Xian Jian; Xiangyun Xiao; Longjiang Deng; Wei Tian; Xin Wang; Nasir Mahmood; ShiXue Dou

doi:10.1021/acsami.7b18324

Heterostructured Nanorings of Fe-Fe₃O₄@C Hybrid with Enhanced Microwave Absorption Performance

ACS Appl Mater Interfaces. 2018 Mar 21;10(11):9369-9378. doi: 10.1021/acsami.7b18324. Epub 2018 Mar 6.

Authors

Xian Jian^{1

2}, Xiangyun Xiao¹, Longjiang Deng², Wei Tian¹, Xin Wang², Nasir Mahmood^{3

4}, ShiXue Dou⁴

Affiliations

¹ School of Materials and Energy , University of Electronic Science and Technology of China , Chengdu 611731 , China.
² National Engineering Research Center of Electromagnetic Radiation Control Materials, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering , University of Electronic Science and Technology of China , Chengdu 610054 , China.
³ School of Engineering , RMIT University , 124 La Trobe Street , 3001 Melbourne , Victoria , Australia.
⁴ Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials , University of Wollongong , North Wollongong 2500 , Australia.

PMID: 29470047
DOI: 10.1021/acsami.7b18324

Abstract

Microwave absorption is a critical challenge with progression in electronics, where fine structural designing of absorbent materials plays an effective role in optimizing their microwave absorption properties. Here, we have developed Fe₃O₄@C (FC) and Fe-Fe₃O₄@C (FFC) hybrid nanorings via a hydrothermal method coupled with a chemical catalytic vapor deposition technique. FC and FFC hybrid nanorings have fine carbon coating while their size can easily be tunable in a certain range from 80-130 to 90-140 nm. The optimized FC and FFC hybrid nanorings bear minimum reflection loss (RL) values of -39.1 dB at 15.9 GHz and -32.9 dB at 17.1 GHz, respectively, whereas FFC shows an effective absorption bandwidth (RL values < -10 dB) ranged from 5.2 to 18 GHz. Such an enhanced microwave absorption performance of hybrid nanorings is mainly due to the suitable impedance characteristics, multilevel interfaces, and polarization features in nanorings. This work provides an approach to design hybrid materials having a complex structure to enhance the microwave absorption properties.

Keywords: carbon overcoat; catalytic chemical vapor deposition; hybrid nanorings; iron oxide; microwave absorption.