Monaico Eduard V, Morari Vadim, Ursaki Veaceslav V, Nielsch Kornelius, Tiginyanu Ion M
National Center for Materials Study and Testing, Technical University of Moldova, 2004 Chisinau, Moldova.
Institute of Electronic Engineering and Nanotechnologies "D. Ghitu", 2028 Chisinau, Moldova.
Nanomaterials (Basel). 2022 Apr 28;12(9):1506. doi: 10.3390/nano12091506.
The preparation of GaAs nanowire templates with the cost-effective electrochemical etching of (001) and (111)B GaAs substrates in a 1 M HNO 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.
报道了通过在1 M HNO电解液中对(001)和(111)B GaAs衬底进行经济高效的电化学蚀刻来制备GaAs纳米线模板。电化学蚀刻得到了相对于晶圆表面具有垂直和平行取向的GaAs纳米线。通过恒电流铁沉积到这些模板中制备了核壳GaAs-Fe纳米线阵列。通过扫描电子显微镜(SEM)和振动样品磁强计(VSM)对制备的阵列进行了研究。分析了构成圆柱形结构外壳的多晶铁纳米管壳的磁性，如饱和和剩磁矩、矩形比和矫顽力，并与先前报道的铁磁纳米线和纳米管的数据进行了比较。
