• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Composite silica spheres with magnetic and luminescent functionalities
【24h】

Composite silica spheres with magnetic and luminescent functionalities

机译：具有磁性和发光功能的复合二氧化硅球

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A new class of highly fluorescent, photostable, and magnetic core/shell nanoparticles in the submicrometer size range has been synthesized from a modified Stober method combined with the layer-by-layer (LbL) assembly technique. Luminescent magnetic nanoparticles are prepared via two main steps. The first step involves controlled addition of tetraethoxysilane to a dispersion of Fe3O4/gamma-Fe2O3 nanoparticles, which are thereby homogeneously incorporated as cores into monodisperse silica spheres. The second step involves the LbL assembly of polyelectrolytes and luminescent CdTe quantum dots onto the surfaces of the silica-coated magnetite/maghemite particles, which are finally covered with an outer shell of silica. These spherical particles have a typical diameter of 220 +/- 10 nm and a saturation magnetization of 1.34 emu g(-1) at room temperature, and exhibit strong excitonic photoluminescence. Nanoparticles with such a core/shell architecture have the added benefit of providing a robust platform (the outer silica shell) for incorporating diverse functionalities into a single nanoparticle.
机译：通过改进的Stober方法结合逐层（LbL）组装技术，已经合成了亚微米尺寸范围内的一类新型的高荧光，光稳定和磁性核/壳纳米粒子。发光磁性纳米颗粒通过两个主要步骤制备。第一步涉及将四乙氧基硅烷控制添加到Fe3O4 /γ-Fe2O3纳米颗粒的分散体中，从而将其作为核均匀地掺入单分散二氧化硅球中。第二步是将聚电解质和发光的CdTe量子点的LbL组装到涂有二氧化硅的磁铁矿/磁赤铁矿颗粒的表面上，最后将其用二氧化硅的外壳覆盖。这些球形颗粒的典型直径为220 +/- 10 nm，在室温下的饱和磁化强度为1.34 emu g（-1），并显示出强的激子光致发光。具有这种核/壳结构的纳米颗粒具有提供坚固平台（二氧化硅外层壳）以将各种功能整合到单个纳米颗粒中的额外好处。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号