高等学校化学学报

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铁氧化物/金磁性核壳纳米粒子的制备及其富集与SERS研究

鲍芳, 姚建林, 顾仁敖   

  1. 苏州大学化学系, 苏州 215006
  • 收稿日期:2008-03-07 修回日期:1900-01-01 出版日期:2008-08-10 发布日期:2008-08-10
  • 通讯作者: 顾仁敖

Preparation of Magnetic Fe Oxide Core/Au Shell Nanoparticles and Their Surface-enhanced Raman Spectroscopy

BAO Fang, YAO Jian-Lin, GU Ren-Ao*   

  1. Department of Chemistry, Suzhou University, Suzhou 215006, China
  • Received:2008-03-07 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10
  • Contact: GU Ren-Ao

摘要: 本文用种子生长法制备铁氧化物/金磁性核壳纳米粒子, 并利用SERS对其磁场靶向性进行了检测.

关键词: 磁性核壳纳米粒子, 表面增强拉曼光谱, 铁氧化物/金

Abstract: Fe oxide core/Au shell nanoparticles were prepared by the reduction of Au3+ onto the surfaces of Fe oxide nanoparticles and characterized by scanning electron microscopy(SEM). The results reveal that the prepared core/shell nanoparticles were covered by Au shell and the surfaces of the core/shell particles are jagged after the initial addition of Au3+. Surface enhanced Raman scattering(SERS) activities of these magnetic nanoparticles were studied by using pyridine(Py) as a probe molecule after a magnet was used to concentrate the colloid. It was found that the SERS intensity depends on the Au shell thickness of the core/shell nanoparticles and strengthens with the increasing shell thickness. The detection limit for Py can be very low when the magnetic Fe oxide core/Au shell nanoparticles were used and even down to 10-7 mol/L.

Key words: Magnetic core/shell nanoparticles, Surface enhanced Raman spectrum, Fe oxide/Au

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