Laser methods for the synthesis of cobalt-based magnetic nanoparticles
Shingareva E.I., Dzus M.A., Chernikov A.S., Kochuev D.A., Voznesenskaya A.A., Chkalov R.V., Abramov D.V., Khorkov K.S.
Vladimir State University
Abstract
Nanoscale metal particles occupy a special place among other nanoparticles, namely, transition nanoparticles, which have catalytic, magnetic, mechanical, optical, electrical and biological properties and are of particular interest due to their high chemical activity. Cobalt nanoparticles are actively used in the production of batteries, various operational alloys, dyes, as well as in biomedicine, where they are used to diagnose cancer, deliver drugs and separate cells and proteins.
Colloidal solutions of cobalt nanoparticles were synthesized by laser femtosecond ablation. Using Raman spectroscopy, the positions of peaks similar to cobalt oxide Co3O4 were detected, from which it can be concluded that colloidal solutions of cobalt oxide were obtained in ethanol and acetone media. It has been established that the resulting nanoparticles have magnetic properties, which makes it possible to use them in theranostics.
Using a scanning electron microscope, it was possible to see that the nanoparticles are spherical, ranging in size from 10 to 300 nm. Sometimes they form small clusters, which are eliminated with the help of an ultrasonic bath. By means of spectrophotometry, it was revealed that the peak of the absorption spectrum in colloidal solutions in both liquids falls on the short-wavelength part of the spectrum (about 200 nm), decreasing with increasing wavelength.
This study was funded by the Russian Science Foundation (project no. 22-79-10348,
https://rscf.ru/project/22-79-10348/).
Speaker
Kirill Khorkov
Vladimir State University
Russia
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