A solid state nanopore device for investigating the magnetic properties of magnetic nanoparticles

Park S., Lim J., Eugene Pak Y., Moon S., Song Y.
Sensors (Switzerland), 13(6), 6900(2013)
DOI: 10.3390/s130606900

Abstract

In this study, we explored magnetic nanoparticles translocating through a nanopore in the presence of an inhomogeneous magnetic field. By detecting the ionic current blockade signals with a silicon nitride nanopore, we found that the translocation velocity that is driven by magnetic and hydrodynamic forces on a single magnetic nanoparticle can be accurately determined and is linearly proportional to the magnetization of the magnetic nanoparticle. Thus, we obtained the magneto-susceptibility of an individual nanoparticle and the average susceptibility over one hundred particles within a few minutes. © 2013 by the authors; licensee MDPI, basel, Switzerland.