Department of Applied Physics and Astronomy, University of Sharjah, United Arab Emirates.
Department of Medical Diagnostic Imaging, University of Sharjah, United Arab Emirates.
Nanotechnology. 2023 Feb 20;34(18). doi: 10.1088/1361-6528/acb715.
Aiming to obtain hybrid magneto-plasmonic nanostructures, we have developed multisegmented and core/shell structured Fe-Au nanorods using template assisted electrochemical deposition. A facile method of tuning the growth pattern of multisegmented nanorods into core/shell structured is demonstrated. With a precise control of current density and deposition time, a brick-stacked wire like growth led to the formation of hollow nanotubes that could be further tuned to multilayered hollow nanotubes and core/shell structured nanorods. TEM imaging and STEM-EELS technique were used to explore the morphology, microstructure and the distribution of Au and Fe in the nanorods. The easy magnetization direction was found to be perpendicular to the nanorods' growth direction in the segmented nanorods. On the other hand, core/shell nanorods exhibited isotropic behavior. Our findings provide deeper insights into the fabrication of hybrid nanorods and the opportunity to tune the fabrication method to vary their morphology accordingly. Such studies will benefit design of hybrid nanorods with specific morphologies and physical properties and hence their integration into sensing, spintronics and other potential biomedical and technological applications.
为了获得混合磁等离子体纳米结构，我们使用模板辅助电化学沉积法开发了多节和核/壳结构的 Fe-Au 纳米棒。本文展示了一种简便的方法，可以将多节纳米棒的生长模式调谐为核/壳结构。通过精确控制电流密度和沉积时间，砖堆叠线的生长导致形成了空心纳米管，进一步调谐可以得到多层空心纳米管和核/壳结构纳米棒。TEM 成像和 STEM-EELS 技术用于研究纳米棒的形貌、微结构以及 Au 和 Fe 在纳米棒中的分布。发现分段纳米棒中易磁化方向垂直于纳米棒的生长方向。另一方面，核/壳纳米棒表现出各向同性行为。我们的研究结果为混合纳米棒的制备提供了更深入的了解，并为相应地调整制备方法以改变其形态提供了机会。这种研究将有利于设计具有特定形貌和物理性质的混合纳米棒，并将其集成到传感、自旋电子学和其他潜在的生物医学和技术应用中。
