Investigation of Influences on the Detectability of Magnetic Nanoparticles by Means of Microwaves for Biomedical Applications

This paper deals with the detection of magnetic modulated nanoparticles by means of ultra-wideband sensing. Magnetic nanoparticles are modulated by an external magnetic field. The resulting scattering changes of the magnetic nanoparticles are analyzed depending on the mass, the magnetic field strength and the surrounding medium in which the particles are embedded. The experiments are carried out on phantom measurements and the results show a linear behavior of the measured radar signal depending on the mass. Furthermore, the experiments show that the optimal choice of the magnetic field strength can increase the detectability of the magnetic nanoparticles. This applies both to particles that are diluted in distilled water and to particles that are embedded in a solid surrounding medium.