| Zugriffsnummer | 37895 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Size analysis of single-core magnetic nanoparticles |
| Autor(in); Institution |
Ludwig, F.; Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik, TU Braunschweig, Braunschweig, GERMANY
Balceris, C.; Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik, TU Braunschweig, Braunschweig, GERMANY
Viereck, T.; Institut für Elektrische Messtechnik und Grundlagen der Elektrotechnik, TU Braunschweig, Braunschweig, GERMANY
Posth, Oliver; 8.2, Biosignale, PTB-Berlin
Steinhoff, Uwe; 8.2, Biosignale, PTB-Berlin
Gavilán, H.; Instituto de Ciencia de Materiales de Madrid, ICMM/CSIC, Cantoblanco, Madrid, SPAIN
Costo, R.; Instituto de Ciencia de Materiales de Madrid, ICMM/CSIC, Cantoblanco, Madrid, SPAIN
Zeng, L.; Department of Applied Physics, Chalmers University of Technology, Göteborg, SWEDEN
Olsson, E.; Department of Applied Physics, Chalmers University of Technology, Göteborg, SWEDEN
Jonasson, C.; ACREO Swedish ICT AB, Göteborg, SWEDEN
Johansson, C.; ACREO Swedish ICT AB, Göteborg, SWEDEN
|
| Quelle/Jahr | Journal of Magnetism and Magnetic Materials: 427 (2017), 19 - 24 |
| ISSN | 0304-8853 (PRINT) |
| DOI | |
| Verlag | Amsterdam: Elsevier |
| Freie Schlagworte | Single-core nanoparticles ; Size distribution ; Transmission electron microscopy ; Dynamic light scattering ; Magnetization ; Brownian and Néel relaxation |
| Zusammenfassung | Single-core iron-oxide nanoparticles with nominal core diameters of 14 nm and 19 nm were analyzed with a variety of non-magnetic and magnetic analysis techniques, including transmission electron microscopy (TEM), dynamic light scattering (DLS), static magnetization vs. magnetic field (M-H) measurements, ac susceptibility (ACS) and magnetorelaxometry (MRX). From the experimental data, distributions of core and hydrodynamic sizes are derived. Except for TEM where a number-weighted distribution is directly obtained, models have to be applied in order to determine size distributions from the measurand. It was found that the mean core Diameters determined from TEM, M-H, ACS and MRX measurements agree well although they are based on different models (Langevin function, Brownian and Néel relaxation times). Especially for the sample with large cores, particle interaction effects come into play, causing agglomerates which were detected in DLS, ACS and MRX measurements. We observed that the number and size of agglomerates can be minimized by sufficiently strong diluting the suspension. |
Zitierung
Ludwig, F., Balceris, C., Viereck, T., Posth, O., Steinhoff, U., Gavilán, H., Costo, R., Zeng, L., Olsson, E., Jonasson, C., & Johansson, C. (2017). Size analysis of single-core magnetic nanoparticles. Journal of Magnetism and Magnetic Materials, 427, 19–24. https://doi.org/10.1016/j.jmmm.2016.11.113