| Zugriffsnummer | 45284 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Goethite nanorods: synthesis and investigation of the size effect on their orientation within a magnetic field by SAXS |
| Autor(in); Institution |
Hinrichs, Stephan; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
Grossmann, Larissa; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
Clasen, Eike; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
Grotian genannt Klages, Hannah; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
Skroblin, Dieter; 7.2, Röntgenmesstechnik mit Synchrotronstrahlung, PTB-Berlin
Gollwitzer, Christian; 7.2, Röntgenmesstechnik mit Synchrotronstrahlung, PTB-Berlin
Meyer, Andreas; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
Hankiewicz, Birgit; Institute of Physical Chemistry, University of Hamburg, Hamburg, GERMANY
|
| Quelle/Jahr | Nanomaterials: 10 (2020), 12, 2079 - 4991 |
| Artikelnummer | 2526 |
| Availability | [online only] |
| ISSN | 2079-4991 |
| DOI | |
| Verlag | Basel: MDPI |
| Freie Schlagworte | goethite ; akaganeite ; anisotropy ; hydrothermal ; orientation ; particle synthesis |
| Zusammenfassung | Goethite is a naturally anisotropic, antiferromagnetic iron oxide. Following its atomic structure, crystals grow into a fine needle shape that has interesting properties in a magnetic field. The needles align parallel to weak magnetic fields and perpendicular when subjected to high fields. We synthesized goethite nanorods with lengths between 200 nm and 650 nm in a two-step process. In a first step we synthesized precursor particles made of akaganeite (β-FeOOH) rods from iron(III)chloride. The precursors were then treated in a hydrothermal reactor under alkaline conditions with NaOH and polyvinylpyrrolidone (PVP) to form goethite needles. The aspect ratio was tunable between 8 and 15, based on the conditions during hydrothermal treatment. The orientation of these particles in a magnetic field was investigated by small angle X-ray scattering (SAXS). We observed that the field strength required to trigger a reorientation is dependent on the length and aspect ratio of the particles and could be shifted from 85 mT for the small particles to about 147 mT for the large particles. These particles could provide highly interesting magnetic properties to nanocomposites, that could then be used for sensing applications or membranes. |
| Kostenfreier Zugang | Open Access Gold |
| Rechteinformation | CC BY 4.0 ; Creative Commons Attribution 4.0 License |
| Themenbereich der Metrologie | Photometrie und Radiometrie |
Zitierung
Hinrichs, S., Grossmann, L., Clasen, E., Grotian genannt Klages, H., Skroblin, D., Gollwitzer, C., Meyer, A., & Hankiewicz, B. (2020). Goethite nanorods: synthesis and investigation of the size effect on their orientation within a magnetic field by SAXS. Nanomaterials, 10(12), 2079–4991. https://doi.org/10.3390/nano10122526