Synchrotron SAXS
data from solutions of
Fe3O4 nanoparticles (radius 5.6 nm )
in
water, HCLO4, pH 7
were collected
on the
EMBL P12 beam line
at the PETRA III storage ring
(DESY; Hamburg, Germany)
using a Pilatus 2M detector
at a sample-detector distance of 4.2 m and
at a wavelength of λ = 0.124 nm
(I(s) vs s, where s = 4πsinθ/λ, and 2θ is the scattering angle).
at 20°C.
20 successive
0.100 second frames were collected.
The data were normalized to the intensity of the transmitted beam and radially averaged; the scattering of the solvent-blank was subtracted.
Magnetite nanoparticles were fabricated by the coprecipitation of Fe2+ and Fe3+ by NH4OH at 60 °C. Afterwards, an magnetic fluid (MF) was obtained by dispersion of the freshly prepared magnetite nanoparticles in water and electrostatically stabilized by the addition of HClO4. The final concentration of MNPs in the MF was 28 mg/mL. The hydrodynamic diameter of the MNPs, determined by dynamic light scattering (DLS) (Zetasizer), has a nominal size of 26 nm alongside polydispersity of 0.26, and the radius of MNPs estimated from AFM was 5.6 nm.
In air SAXS measurements. Temperature-controlled capillary holder.
Magnetite nanoparticles were fabricated by the coprecipitation of Fe2+ and Fe3+ by NH4OH at 60 °C. Afterwards, an magnetic fluid (MF) was obtained by dispersion of the freshly prepared magnetite nanoparticles in water and electrostatically stabilized by the addition of HClO4. The final concentration of MNPs in the MF was 28 mg/mL. The hydrodynamic diameter of the MNPs, determined by dynamic light scattering (DLS) (Zetasizer), has a nominal size of 26 nm alongside polydispersity of 0.26, and the radius of MNPs estimated from AFM was 5.6 nm.
SAXS data yields volume weighted particle size distribution (p(r)). Average particle radius: 4.0 nm.
s, nm-1
