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首页> 外文期刊>Journal of magnetism and magnetic materials >Magnetic force microscopy characterization of core-shell cobalt-oxide/hydroxide nanoparticles
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Magnetic force microscopy characterization of core-shell cobalt-oxide/hydroxide nanoparticles

机译：核 - 壳钴氧化物/氢氧化物纳米粒子的磁力显微镜表征

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摘要

Cobalt-based nanoparticles directly synthesized on conductive substrates through electrodeposition find application in a broad range of scientific and technological fields.The capability to characterize both morphological parameters (e.g., shape, size, structure, and numerical density per unit of area) and magnetic properties (e.g., magnetic moment, saturation magnetization, or coercivity) directly on the substrate on which they are grown is fundamental for many of those applications. In this work, we report on the use of magnetic force microscopy (MFM) to characterize Co-based nanoparticles synthesized through electrodeposition on Al substrates using two different counter electrodes, i.e., Co and Pt. Morphological analysis using AFM and scanning electron microscopy (SEM) was used to assess differences in size and number density of the nanoparticles obtained using the two counter electrodes, while MFM was employed to measure the remanent magnetization of single isolated nanoparticles, to asses the presence of a nonmagnetic shell on the nanoparticles and to estimate their thickness.
机译：通过电沉积通过电沉积在导电基板上直接合成的基于钴基纳米颗粒在广泛的科学和技术领域中进行应用。表征形态参数（例如，每个区域的形状，尺寸，结构和数值密度）和磁性的能力（例如，磁矩，饱和磁化或矫顽力）直接在其生长的基材上是对这些应用中的许多应用的基础。在这项工作中，我们报告使用磁力显微镜（MFM）来表征通过两个不同的计数器，即Co和Pt在Al基材上通过电沉积合成的Co基纳米颗粒。使用AFM和扫描电子显微镜（SEM）的形态学分析用于评估使用两个计数器电极获得的纳米颗粒的尺寸和数密度的差异，而MFM采用MFM测量单分离纳米颗粒的剩余磁化，以确保存在纳米颗粒上的非磁性壳和估计它们的厚度。

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  • 来源
    《Journal of magnetism and magnetic materials》 |2020年第12期|167299.1-167299.9|共9页
  • 作者

    Livia Angeloni; Daniele Passeri; Francesca Anna Scaramuzzo; Pier Giorgio Schiavi; Francesca Pagnanelli; Marco Rossi;

  • 作者单位

    Department of Bask and Applied Sciences for Engineering Sapienza University of Rome Via A. Scarpa 14 00161 Rome Italy;

    Department of Bask and Applied Sciences for Engineering Sapienza University of Rome Via A. Scarpa 14 00161 Rome Italy Research Center for Nanotechnology applied to Engineering of Sapienza University of Rome (CNIS) Piazzcale A. Moro 5 00185 Rome Italy;

    Department of Bask and Applied Sciences for Engineering Sapienza University of Rome Via A. Scarpa 14 00161 Rome Italy;

    Department of Chemistry Sapienza University of Rome P.le A. Mow 5 00185 Rome Italy;

    Department of Chemistry Sapienza University of Rome P.le A. Mow 5 00185 Rome Italy;

    Department of Bask and Applied Sciences for Engineering Sapienza University of Rome Via A. Scarpa 14 00161 Rome Italy Research Center for Nanotechnology applied to Engineering of Sapienza University of Rome (CNIS) Piazzcale A. Moro 5 00185 Rome Italy;

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  • 正文语种 eng
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  • 关键词

    Cobalt nanoparticles; Magnetic force microscopy; Magnetic properties; Electrodeposition; Cobalt oxide/hydroxide; Shell thickness;

    机译：钴纳米粒子;磁力显微镜;磁性;电沉积;氧化钴/氢氧化物;壳体厚度;

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