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

fYear

2008

fDate

25-29 Feb. 2008

Firstpage

83

Lastpage

85

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICONN.2008.4639251

Filename

4639251