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Magnetic Core/Shell Fe_3O_4/Au and Fe_3O_4/Au/Ag Nanoparticles with Tunable Plasmonic Properties

机译:具有可调等离子体特性的磁性核/壳Fe_3O_4 / Au和Fe_3O_4 / Au / Ag纳米粒子

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摘要

Synthesis of magnetic nanoparticles has long been of scientific and technological interest due to their potential applications in tissue imaging, drug delivery, and information storage. Important progress has been made in chemical synthesis of monodisperse magnetic nanoparticles of metals, alloys, and oxides. Recently, incorporation of optically active components onto magnetic nanoparticles has attracted much attention. Dumbbell-like Au-Fe_3O_4~6 or CdS-FePt~7 nanoparticles have been synthesized and shown interesting optical properties in Au or CdS and magnetic properties in Fe_3O_4 or FePt. Au coating over magnetic nanoparticles is an even more attractive composite system: with Au coating, the magnetic nanoparticles, especially high moment metallic magnetic nanoparticles, can be stabilized more efficiently in corrosive biological conditions and readily functionalized through the well-developed Au-S chemistry; the coating also renders the magnetic nanoparticles with plasmonic properties. This makes the core/shell composite nanoparticles extremely interesting for magnetic, optical, and biomedical applications.
机译:磁性纳米粒子的合成由于其在组织成像,药物递送和信息存储中的潜在应用而长期以来一直具有科学和技术兴趣。化学合成金属,合金和氧化物的单分散磁性纳米颗粒已取得重要进展。近来,将光学活性组分结合到磁性纳米颗粒上引起了很多关注。已经合成了哑铃状的Au-Fe_3O_4〜6或CdS-FePt〜7纳米粒子,并显示出有趣的Au或CdS光学性质以及Fe_3O_4或FePt的磁性。磁性纳米颗粒上的Au涂层是一种更具吸引力的复合系统:利用Au涂层,磁性纳米颗粒(尤其是高力矩金属磁性纳米颗粒)可以在腐蚀性生物条件下更有效地稳定,并且可以通过发达的Au-S化学性质轻松地进行功能化;该涂层还使磁性纳米颗粒具有等离子体性能。这使得核/壳复合纳米颗粒对于磁性,光学和生物医学应用而言非常有趣。

著录项

  • 来源
    《Journal of the American Chemical Society》 |2007年第28期|p.8698-8699|共2页
  • 作者单位

    Department of Chemistry, Brown University, Providence, Rhode Island 02912;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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