Viola Tokárová – Diploma thesis summary

Synthesis, properties and structure of composite Ag-Fe3O4 nanoparticles

The aim of the present work is to prepare composite Ag-Fe3O4 nanoparticles. Many
kinds of nano-sized antibacterial materials such as TiO2, ZnO, MgO, chitosan, copper and
silver have been reported elsewhere. Among them, nanocrystalline silver was proven
to be the most effective antimicrobial agent, since silver and its compounds have
powerful antimicrobial capability and broad inhibitory biocidal spectra for microbes
including bacteria, viruses and eukaryotic microorganisms. Fe3O4 with strong
magnetic properties and low toxicity can be heated to the elevated temperature in an
external alternating magnetic field.
In this work relatively monodisperse silver-coated Fe3O4 nanoparticles were
produced by reducing silver nitrate on the Fe3O4 nanoparticles surface. Thereby
bifunctional nanoparticles having both superparamagnetic and antibacterial properties
were synthesized. These particles are characterized from the distribution of size and
described their morphology and shape by the microscopic methods.