Hydrothermal synthesis, off-axis electron holography and magnetic properties of Fe3O4 nanoparticles

Electron Microscopy and Analysis Group Conference 2013

Almeida, Trevor P.^1 ; Muxworthy, Adrian R.^1 ; Williams, Wyn^2 ; Kasama, Takeshi^3 ; Dunin-Borkowski, Rafal E.^4

Department of Earth Science and Engineering, South Kensington Campus, Imperial College London, SW7 2AZ London, United Kingdom^1

School of GeoSciences, University of Edinburgh, EH9 3JW Edinburgh, United Kingdom^2

Centre for Electron Nanoscopy, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark^3

Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons, Peter Grünberg Institute, Forschungszentrum Jülich, D-52425 Jülich, Germany^4

关键词: Fe3O4 nanoparticles;    Inter-particle interaction;    Off-axis electron holography;    Precursor solutions;    Single domains;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/522/1/012062/pdf
DOI  :  10.1088/1742-6596/522/1/012062

来源: IOP

【 摘 要 】

The hydrothermal synthesis of Fe3O4nanoparticles (NPs) (3/ FeCl2precursor solution at pH ∼ 12 has been confirmed using complementary characterisation techniques of transmission electron microscopy and X-ray diffractometry. Off-axis electron holography allowed for visualisation of their single domain (SD) nature, as well as inter-particle interactions, with the latter attributed to explain the pseudo-SD/multi-domain behaviour demonstrated by bulk magnetic measurements.