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Article

Core–Shell GaAs-Fe Nanowire Arrays: Fabrication Using Electrochemical Etching and Deposition and Study of Their Magnetic Properties

by
Eduard V. Monaico
1,*,
Vadim Morari
2,
Veaceslav V. Ursaki
1,3,
Kornelius Nielsch
4 and
Ion M. Tiginyanu
1,3
1
National Center for Materials Study and Testing, Technical University of Moldova, 2004 Chisinau, Moldova
2
Institute of Electronic Engineering and Nanotechnologies “D. Ghitu”, 2028 Chisinau, Moldova
3
Academy of Sciences of Moldova, 2001 Chisinau, Moldova
4
Institute for Metallic Materials (IMW), Leibniz Institute of Solid State and Materials Research (IFW Dresden), Helmholtzstr. 20, 01069 Dresden, Germany
*
Author to whom correspondence should be addressed.
Nanomaterials 2022, 12(9), 1506; https://doi.org/10.3390/nano12091506
Submission received: 27 March 2022 / Revised: 26 April 2022 / Accepted: 27 April 2022 / Published: 28 April 2022
(This article belongs to the Special Issue Semiconductor Nanowires: Fabrication, Characterization, and Applications)
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Abstract

The preparation of GaAs nanowire templates with the cost-effective electrochemical etching of (001) and (111)B GaAs substrates in a 1 M HNO3 electrolyte is reported. The electrochemical etching resulted in the obtaining of GaAs nanowires with both perpendicular and parallel orientations with respect to the wafer surface. Core–shell GaAs-Fe nanowire arrays have been prepared by galvanostatic Fe deposition into these templates. The fabricated arrays have been investigated by means of scanning electron microscopy (SEM) and vibrating sample magnetometry (VSM). The magnetic properties of the polycrystalline Fe nanotubes constituting the shells of the cylindrical structures, such as the saturation and remanence moment, squareness ratio, and coercivity, were analyzed in relation to previously reported data on ferromagnetic nanowires and nanotubes.
Keywords: nanowires; nanotubes; anodization; electroplating; magnetic anisotropy; hysteresis loop nanowires; nanotubes; anodization; electroplating; magnetic anisotropy; hysteresis loop

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MDPI and ACS Style

Monaico, E.V.; Morari, V.; Ursaki, V.V.; Nielsch, K.; Tiginyanu, I.M. Core–Shell GaAs-Fe Nanowire Arrays: Fabrication Using Electrochemical Etching and Deposition and Study of Their Magnetic Properties. Nanomaterials 2022, 12, 1506. https://doi.org/10.3390/nano12091506

AMA Style

Monaico EV, Morari V, Ursaki VV, Nielsch K, Tiginyanu IM. Core–Shell GaAs-Fe Nanowire Arrays: Fabrication Using Electrochemical Etching and Deposition and Study of Their Magnetic Properties. Nanomaterials. 2022; 12(9):1506. https://doi.org/10.3390/nano12091506

Chicago/Turabian Style

Monaico, Eduard V., Vadim Morari, Veaceslav V. Ursaki, Kornelius Nielsch, and Ion M. Tiginyanu. 2022. "Core–Shell GaAs-Fe Nanowire Arrays: Fabrication Using Electrochemical Etching and Deposition and Study of Their Magnetic Properties" Nanomaterials 12, no. 9: 1506. https://doi.org/10.3390/nano12091506

APA Style

Monaico, E. V., Morari, V., Ursaki, V. V., Nielsch, K., & Tiginyanu, I. M. (2022). Core–Shell GaAs-Fe Nanowire Arrays: Fabrication Using Electrochemical Etching and Deposition and Study of Their Magnetic Properties. Nanomaterials, 12(9), 1506. https://doi.org/10.3390/nano12091506

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