Simultaneous surface and bulk sensitive XAS measurements of magnetic particle clusters

X-Ray Microscopy Conference 2016

Swaraj, S.^1 ; Dietrich, P.M.^2 ; Unger, W.E.S.^2

Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin - BP 48, Gif-sur-Yvette Cedex

F-91192, France^1

BAM Federal Institute of Materials Research and Testing, Berlin

12200, Germany^2

关键词: Magnetic iron oxide nanoparticles;    Magnetic particle clusters;    Measurements of;    Nanoparticle clusters;    Organic stabilizers;    Oxidation state;    Photo multiplier tube;    Scanning transmission x ray microscopy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/849/1/012014/pdf
DOI  :  10.1088/1742-6596/849/1/012014

来源: IOP

【 摘 要 】

Magnetic iron oxide nanoparticle clusters (mnpc) coated with organic stabilizers were investigated using scanning transmission x-ray microscopy (STXM). Simultaneous surface and bulk sensitive Fe L3edge absorption spectra, obtained using a photomultiplier tube and a channeltron, were used to detect subtle changes in the oxidation state in the surface and bulk of Iron Oxide mnpc. The effectiveness of this mode of STXM operation is demonstrated for these nanoparticle clusters.