Synthesis and characterization of hybrid core-shell Fe3O4/SiO2 nanoparticles for biomedical applications

I. V. Zelepukin, V. O. Shipunova, A. B. Mirkasymov, P. I. Nikitin, M. P. Nikitin, S. M. Deyev

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


The creation of markers that provide both visual and quantitative information is of considerable importance for the mapping of tissue macrophages and other cells. We synthesized magnetic and magneto-fluorescent nanomarkers for the labeling of cells which can be detected with high sensitivity by the magnetic particle quantification (MPQ) technique. For stabilization under physiological conditions, the markers were coated with a dense silica shell. In this case, the size and zeta-potential of nanoparticles were controlled by a modified Stober reaction. Also, we developed a novel facile two-step synthesis of carboxylic acid-functionalized magnetic SiO2 nanoparticles, with a carboxyl polymer shell forming on the nanoparticles before the initiation of the Stober reaction. We extensively characterized the nanomarkers by transmission electron microscopy, electron microdiffraction, and dynamic and electrophoretic light scattering. We also studied the nanoparticle cellular uptake by various eukaryotic cell lines.

Original languageEnglish
Pages (from-to)58-65
Number of pages8
JournalActa Naturae
Issue number4
Publication statusPublished - 2017
Externally publishedYes


  • Cell labeling
  • Magnetic detection
  • Magnetic nanoparticles
  • Silicium dioxide
  • Surface modification

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Medicine
  • Molecular Biology

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