Type

Journal Article

Authors

Karl Mandel
Marion Straßer
Maximilian Oppmann
Tim Granath
Michael Schneider
Aleksey Shmeliov
Olga Safonova
Marcin Sikora
Marek Przybylski
Jan Żukrowski
and 2 others

Subjects

Chemistry

Topics
doped nanoparticles s doping synthesis zinc x ray absorption iron oxide nanoparticles routes thermal decomposition measurable magnetisation

Pushing up the magnetisation values for iron oxide nanoparticles: Via zinc doping: X-ray studies on the particle's sub-nano structure of different synthesis routes (2016)

Abstract The maximum magnetisation (saturation magnetisation) obtainable for iron oxide nanoparticles can be increased by doping the nanocrystals with non-magnetic elements such as zinc. Herein, we closely study how only slightly different synthesis approaches towards such doped nanoparticles strongly influence the resulting sub-nano/atomic structure. We compare two co-precipitation approaches, where we only vary the base (NaOH versus NH3), and a thermal decomposition route. These methods are the most commonly applied ones for synthesising doped iron oxide nanoparticles. The measurable magnetisation change upon zinc doping is about the same for all systems. However, the sub-nano structure, which we studied with M?ssbauer and X-ray absorption near edge spectroscopy, differs tremendously. We found evidence that a much more complex picture has to be drawn regarding what happens upon Zn doping compared to what textbooks tell us about the mechanism. Our work demonstrates that it is crucial to study the obtained structures very precisely when ?playing? with the atomic order in iron oxide nanocrystals.
Collections Ireland -> Trinity College Dublin -> Administrative Staff Authors (Scholarly Publications)
Ireland -> Trinity College Dublin -> Administrative Staff Authors

Full list of authors on original publication

Karl Mandel, Marion Straßer, Maximilian Oppmann, Tim Granath, Michael Schneider, Aleksey Shmeliov, Olga Safonova, Marcin Sikora, Marek Przybylski, Jan Żukrowski and 2 others

Experts in our system

1
Aleksey Shmeliov
Trinity College Dublin
Total Publications: 7