Fabrication of magnetic core–shell Fe nanowires by electrochemical deposition
Author:
Cao Xiaoming1, Mukhtar Aiman1, Gu Liyuan2, Wu Kai Ming1
Affiliation:
1. The State Key Laboratory of Refractories and Metallurgy, Hubei Province Key Laboratory of Systems Science in Metallurgical Process , International Research Institute for Steel Technology, Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan , P. R. China 2. School of Nuclear Technology and Chemistry & Biology , Hubei University of Science and Technology , Xianning 437000 , P. R. China
Abstract
Abstract
Highly-ordered Fe nanowires (NWs) were successfully electrodeposited in a laboratory made anodic aluminum oxide template with a diameter of 30 nm. The as prepared Fe NWs were used as a substrate to prepare core–shell Fe@Fe3O4 NWs after annealing and hydrogen reduction at high temperature. The phase transformation of the oxide shell of electrodeposited Fe NWs took the form Fe2O3 → α-Fe2O3 → Fe3O4. Transmission electron microscopy images revealed that the surface of Fe@Fe
x−1O
x
NWs was smooth and orderly, and the oxide layer was dense and uniform. The magnetic analysis of Fe@Fe
x−1 O
x
nanowires was carried out using a vibrating sample magnetometer. It was found that Fe@Fe3O4 nanowires manifested the characteristics of super-paramagnetism in the direction perpendicular to the nanowires due to smaller coercive force, and they can be suitable material for future biomedical applications.
Publisher
Walter de Gruyter GmbH
Subject
Materials Chemistry,Metals and Alloys,Physical and Theoretical Chemistry,Condensed Matter Physics
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