10.1186/2193-8865-3-25

Separation of the defect-free Fe3O4-Au core/shell fraction from magnetite-gold composite nanoparticles by an acid wash treatment

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  • Hojatollah Montazeri1,
  • Amir Amani1,
  • Hamid Reza Shahverdi2,
  • Emad al din Haratifar2,
  • Ahmad Reza Shahverdi*3,
  1. Department of Medical Biotechnology, School of Advanced Medical Technologies, Tehran University of Medical Sciences, Tehran, 1417614411, IR
  2. Department of Materials Engineering, University of Tarbiat Modares, Tehran, 14115-143, IR
  3. Biotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, 1417614411, IR Pharmaceutical Sciences Research Center, School of Pharmacy, Tehran University of Medical Sciences, Tehran, 417614411, IR
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Published in Issue 30-04-2013

How to Cite

Montazeri, H., Amani, A., Shahverdi, H. R., Haratifar, E. al din, & Shahverdi, A. R. (2013). Separation of the defect-free Fe3O4-Au core/shell fraction from magnetite-gold composite nanoparticles by an acid wash treatment. Journal of Nanostructure in Chemistry, 3(1 (December 2013). https://doi.org/10.1186/2193-8865-3-25
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Abstract

Abstract Some undesired nanoparticles, such as malformed structures or incomplete core/shell Fe 3 O 4 -Au nanocomposites, might be formed when Fe 3 O 4 -Au core/shell nanocomposites are being synthesized. These impurities should be separated before any applications are performed. In this investigation, magnetic cores (Fe 3 O 4 ) were synthesized using a conventional fabrication method involving coprecipitation of Fe 2+ and Fe 3+ . Carboxyl-capped magnetite-gold composite nanoparticles, measuring ≤50 nm, were then synthesized using a plant extract ( Eucalyptus camaldulensis ). The prepared carboxyl-capped magnetite-gold composite nanoparticles were further subjected to acid treatment for 18 h and characterized with different instrumentation methods. The results of the investigation showed that acid treatment can be applied successfully to separate defect-free Fe 3 O 4 -Au core/shell nanoparticles from different types of Fe 3 O 4 -Au nanocomposites, without any considerable changes in their physiochemical properties.

Keywords

  • Magnetite nanocomposite,
  • Fe3O4-Au core/shell,
  • Acid washing,
  • Biosynthesis,
  • Separation
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