Size effects in monodomain magnetite based ferrofluids

Size effects in monodomain magnetite based ferrofluids

Ferrofluids based on two types of hybrid particles Fe 3 O 4 /β-cyclodextrin were prepared: Using monodomain (below 60 nm) magnetite nanoparticles with (A) non-superparamagnetic (non-SPM) behaviour and (B) with superparamagnetic (SPM) behaviour. We found a strong dependence of the hybrid particles’ m...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2008-05, Vol.10 (5), p.877-880
Hauptverfasser: Nedkov, I., Slavov, L., Merodiiska, T., Lukanov, P., Tailhades, Ph, Gougeon, M., Vandenberghe, R. E.
Format: Artikel
Sprache:eng
Schlagworte:
Brief Communication
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electromagnetic fields
Inorganic Chemistry
Irradiation
Lasers
Magnetic properties
Materials Science
Nanoparticles
Nanotechnology
Optical Devices
Optics
Photonics
Physical Chemistry
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Ferrofluids based on two types of hybrid particles Fe 3 O 4 /β-cyclodextrin were prepared: Using monodomain (below 60 nm) magnetite nanoparticles with (A) non-superparamagnetic (non-SPM) behaviour and (B) with superparamagnetic (SPM) behaviour. We found a strong dependence of the hybrid particles’ magnetic properties on their size and homogeneity. In both types of ferrofluids we observed hyperthermia upon applying an ac electromagnetic field with frequency 40 kHz and amplitude 30 kA/m. The maximal Δ Т upon irradiation with duration of about 12 min for the non-SPM particles was 12 °C, while for the SPM ones it was 3.5 °C.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-007-9311-x