Title :
Aging of magnetite nanoparticles in aqueous solutions of differing pH
Author :
Trinchi, Adrian ; Muster, Tim H. ; Dunlop, John B. ; Collocott, Stephen J.
Author_Institution :
Div. of Mater. Sci. & Eng., CSIRO, Clayton, VIC
Abstract :
The structure and magnetic properties of magnetite nanoparticles that have been aged in aqueous solutions of different pH for various time periods have been investigated. Aqueous aging results in particle transformations, where the products have different structural and magnetic properties to those of the starting material. It was found that aging in acidic solutions sees a greater decrease in saturation magnetization, crystallinity, stability and particle shape and size monodispersity than those oxidized in neutral and alkaline solutions.
Keywords :
ageing; iron compounds; magnetic particles; magnetisation; nanoparticles; particle size; Fe3O4; aging; crystallinity; magnetite nanoparticles; saturation magnetization; stability; Aging; Iron; Magnetic moments; Magnetic properties; Nanoparticles; Oxidation; Saturation magnetization; Stability; Temperature; X-ray diffraction; Magnetization; Vibrating Sample Magnetometer; X-Ray Diffraction; hematite; maghemite; magnetite;
Conference_Titel :
Nanoscience and Nanotechnology, 2008. ICONN 2008. International Conference on
Conference_Location :
Melbourne, Vic.
Print_ISBN :
978-1-4244-1503-8
Electronic_ISBN :
978-1-4244-1504-5
DOI :
10.1109/ICONN.2008.4639251
