Characterization: Characterizing Physical Properties of Superparamagnetic Nanoparticles in Liquid Phase Using Brownian Relaxation (Small 22/2017)

The nonlinear magnetic response of SPIONs to magnetic fields induces harmonic signals that contain information of these nanoparticles. In article number 1604135, Jian-Ping Wang and co-workers, report using the phase lag and harmonic ratios in the SPIONs to analyze the saturation magnetization, average hydrodynamic size, the dominating relaxation processes of SPIONs, and the distinction between single- and multi-core particles.