Matic Pobrežnik
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Matic Pobrežnik has a total of 6 co-authors. Here are the top co-authors by number of shared publications:
- Darja Lisjak
Jozef Stefan Institute
1 shared publication - Janez Kovač
Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
1 shared publication - Layla Martin-Samos
CNR-IOM, Democritos National Simulation Center, Istituto Officina dei Materiali, c/o SiSSA
1 shared publication - Stanislav Čampelj
“Jožef Stefan” Institute, Jamova 39, 1000 Ljubljana, Slovenia
1 shared publication - Tomaš Landovsky
Institute of Physics of the Czech Academy of Sciences
1 shared publication - Věra Hamplová
Institute of Physics, Czech Academy of Sciences, 182 00, Prague, Czech Republic
1 shared publication
Latest Publications
- Open Access
- 8 June 2023
- Published by MDPI AG in Nanomaterials
- Vol. 13 (12) , 1822
The Influence of Catechols on the Magnetization of Iron Oxide Nanoparticles
In this study, MNPs were functionalized with pyrocatechol (CAT), pyrogallol (GAL), caffeic acid (CAF), and nitrodopamine (NDA) at pH 8 and pH 11. The functionalization of the MNPs was successful, except in the case of NDA at pH 11. The thermogravimetric analyses indicated that the surface concentration of the catechols was between 1.5 and 3.6 molecules/nm2. The saturation magnetizations (Ms) of the functionalized MNPs were higher than the starting material. XPS analyses showed only the presence of Fe(III) ions on the surface, thus refuting the idea of the Fe being reduced and magnetite being formed on the surfaces of the MNPs. Density functional theory (DFT) calculations were performed for two modes of adsorption of CAT onto two model surfaces: plain and adsorption via condensation. The total magnetization of both adsorption modes remained the same, indicating that the adsorption of the catechols does not affect the Ms. The analyses of the size and the size distribution showed an increase in the average size of the MNPs during the functionalization process. This increase in the average size of the MNPs and the reduction in the fraction of the smallest (i.e., s values.
- 8 June 2023
- Published by MDPI AG in Nanomaterials
- Vol. 13 (12) , 1822
Open AccessThe Influence of Catechols on the Magnetization of Iron Oxide Nanoparticles
In this study, MNPs were functionalized with pyrocatechol (CAT), pyrogallol (GAL), caffeic acid (CAF), and nitrodopamine (NDA) at pH 8 and pH 11. The functionalization of the MNPs was successful, except in the case of NDA at pH 11. The thermogravimetric analyses indicated that the surface concentration of the catechols was between 1.5 and 3.6 molecules/nm2. The saturation magnetizations (Ms) of the functionalized MNPs were higher than the starting material. XPS analyses showed only the presence of Fe(III) ions on the surface, thus refuting the idea of the Fe being reduced and magnetite being formed on the surfaces of the MNPs. Density functional theory (DFT) calculations were performed for two modes of adsorption of CAT onto two model surfaces: plain and adsorption via condensation. The total magnetization of both adsorption modes remained the same, indicating that the adsorption of the catechols does not affect the Ms. The analyses of the size and the size distribution showed an increase in the average size of the MNPs during the functionalization process. This increase in the average size of the MNPs and the reduction in the fraction of the smallest (i.e., s values.