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Hybrid magnetic-plasmonic nanocomposite: embedding cobalt clusters in gold nanorods

机译:混合磁性等离子体纳米复合材料:将钴簇嵌入金纳米棒中

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摘要

We developed a method to fabricate hybrid magnetic-plasmonic nanorods (Au-Co NRs) via a modified seed mediated method. The only modification is to use cobalt ions instead of Au3+ in the preparation of the seed solution to obtain gold nanorods doped with Co clusters. By adjusting the amount of cobalt seed solution, Au-Co NRs of controlled aspect ratio can be obtained. The optical properties of the obtained Au-Co NRs were investigated and compared to those of the pure Au NRs. A slight shift and broadening were observed in the alloys compared to the pure ones, which was attributed to the presence of Co clusters leading to suppression of the dielectric properties. High resolution transmission electron microscopy (HRTEM) images indicate the existence of Co clusters in situ in the Au NR host and clearly show the metal-metal interface. The magnetic properties of the obtained Au-Co NRs increase as the concentration of dopant Co cluster seeds increases, as investigated by vibrating sample magnetometry (VSM). Our approach allows us to design nanomaterials of controlled shape, optical and magnetic properties which have many promising applications in tharanostics and photoelectronics.
机译:我们开发了一种通过改性种子介导的方法制造混合磁性等离子体纳米棒(Au-Co NRS)的方法。唯一的修改是在制备种子溶液中使用钴离子而不是Au3 +,以获得掺杂有共簇的金纳米棒。通过调节钴种子溶液的量,可以获得受控纵横比的Au-Co NR。研究了所得AU-CO NRS的光学性质并与纯AUNRS的光学性质进行研究。与纯净的合金相比,在合金中观察到略微换档和展会,这归因于CO簇的存在导致抑制介电性质。高分辨率透射电子显微镜(HRTEM)图像表明AU NR主机原位的CO簇存在,并清楚地显示金属 - 金属界面。通过振动样品磁体(VSM)研究,所得Au-Co NRS的磁性随着掺杂剂Co簇种子的浓度增加而增加。我们的方法使我们能够设计受控形状,光学和磁性的纳米材料,其在Tharanostics和光电子中具有许多有前途的应用。

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  • 来源
    《RSC Advances》 |2015年第44期|共8页
  • 作者单位

    Natl Res Ctr Ctr Excellence Adv Sci Adv Mat &

    Nanotechnol Lab Giza Egypt;

    Cairo Univ NILES Giza Egypt;

    Natl Res Ctr Ctr Excellence Adv Sci Adv Mat &

    Nanotechnol Lab Giza Egypt;

    Royal Inst Technol Dept Mat Sci S-10044 Stockholm Sweden;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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