Title of article
Separation of the defect-free Fe3O4-Au core/shell fraction from magnetite-gold composite nanoparticles by an acid wash treatment
Author/Authors
Montazer, Hojatollah Department of Medical Biotechnology - School of Advanced Medical Technologies - Tehran University of Medical Sciences, Tehran , Amani, Amir Department of Medical Biotechnology - School of Advanced Medical Technologies - Tehran University of Medical Sciences, Tehran , Shahverdi, Hamid Reza Department of Materials Engineering - University of Tarbiat Modares, Tehran , Haratifar, Emad al din Department of Materials Engineering - University of Tarbiat Modares, Tehran , Shahverdi, Ahmad Reza School of Pharmacy - Tehran University of Medical Sciences, Tehran
Pages
6
From page
1
To page
6
Abstract
Some undesired nanoparticles, such as malformed structures or incomplete core/shell Fe3O4-Au nanocomposites,
might be formed when Fe3O4-Au core/shell nanocomposites are being synthesized. These impurities should
be separated before any applications are performed. In this investigation, magnetic cores (Fe3O4) were
synthesized using a conventional fabrication method involving coprecipitation of Fe2+ and Fe3+. 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 Fe3O4-Au core/shell
nanoparticles from different types of Fe3O4-Au nanocomposites, without any considerable changes in their
physiochemical properties.
Keywords
Magnetite nanocomposite , Fe3O4-Au core/shell , Acid washing , Biosynthesis , Separation
Journal title
Astroparticle Physics
Serial Year
2013
Record number
2436007
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