Colloid and Polymer Science

, Volume 288, Issue 7, pp 787–794 | Cite as

Preparation of sulfate- and carboxyl-functionalized magnetite/polystyrene spheres for further deposition of gold nanoparticles

  • Szu-Ching Hsiao
  • Jinn-Luh Ou
  • Yuh Sung
  • Chang-Pin Chang
  • Ming-Der Ger
Original Contribution

Abstract

A synthetic method developed for preparation of sulfate- and carboxyl-functionalized magnetite/polystyrene (Fe3O4/PS) spheres that can be further decorated with gold (Au) nanoparticles is reported. By using emulsifier-free emulsion polymerization based on potassium persulfate (KPS)/methyl acrylic acid (MAA)/water system in the presence of Fe3O4/PS spheres used as the seeds, PMAA-coated magnetic Fe3O4-PS spheres were readily obtained. The sulfate group is inherent in KPS for initiating the polymerization of PMAA, and eventually it acts as the reducing agent for the deposition of Au nanoparticles. The carboxyl group, on the other hand, could seemingly contribute to immobilize Au nanoparticles precipitated. The morphologies, magnetic properties, and characteristics of oleate-stabilized Fe3O4 nanoparticles, Fe3O4/PS spheres, PMAA-coated Fe3O4/PS spheres, and Au-decorated resultant spheres were respectively studied using transmission electron microscopy, X-ray diffraction, Fourier transform infrared, and superconducting quantum interference device magnetometer.

Keywords

Magnetite/polystyrene sphere Gold nanoparticle Sulfate Carboxyl Poly(methyl acrylic acid) Magnetic spheres 

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Szu-Ching Hsiao
    • 1
  • Jinn-Luh Ou
    • 2
  • Yuh Sung
    • 4
  • Chang-Pin Chang
    • 3
  • Ming-Der Ger
    • 3
  1. 1.Graduate School of Defense Science, Chung Cheng Institute of TechnologyNational Defense UniversityTao-YuanRepublic of China
  2. 2.R&D Center for Membrane Technology, Department of Chemical EngineeringChung Yuan UniversityChung-LiRepublic of China
  3. 3.Department of Applied Chemistry & Materials Science, Chung Cheng Institute of TechnologyNational Defense UniversityTao-YuanRepublic of China
  4. 4.Chemical System Research DivisionChung Shan Institute of Science and TechnologyTao-YuanRepublic of China

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