General overview »
Magnetic Nanoparticles »
Standardization »
Characterization and
analysis methods »
DC magnetization and AC
susceptometer analysis »
Medium and high frequency
AC susceptometry »
Mössbauer spectroscopy »
Electron microscopy »
XRD and SAXS »
SANS »
Electron microscopy »
Ferromagnetic resonance »
Dynamic light scattering and
electrophoretic light scattering »
Fieldflow fractionation »
Magnetic modelling »
Magnetorelaxometry »
Magnetic particle spectroscopy »
Magnetic particle rotation »
Magnetic separation »
NMR R1 and R2 relaxivities »
Magnetic nanoparticle biodetection »
Magnetic hyperthermia measurements »


Dynamic light scattering and electrophoretic light scattering
The hydrodynamic size distribution of the MNPs in a liquid can be determined from the so called correlation function which is obtained from the time dependent light scattering signal of a sample exposed to laser light. Due to the MNP`s Brownian motion this signal is statistically fluctuating and can therefore – under certain assumptions be used to calculate the diffusion coefficient distribution and from this the intensity weighted particle size distribution sizes from a few nm’s up to about 1000 nm can be measured. The zetapotential method detects the electric potential at the shear plane of the nanoparticles and serves as a measure for the particles surface charge.
