NANOMAG Laboratory, Applied Physics Department, iMATUS Materials Institute, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
Yolanda Piñeiro
NANOMAG Laboratory, Applied Physics Department, iMATUS Materials Institute, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
José Rivas
NANOMAG Laboratory, Applied Physics Department, iMATUS Materials Institute, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
Valentin Alek Dediu
Istituto per lo Studio dei Materiali Nanostrutturati (CNR-ISMN), 40129 Bologna, Italy
A novel methodology for the sizing of magnetic nanoparticles (MNPs) based on diffusion is described herein. The sensing core is an electrical coil wrapped around a capillary filled by an MNP solution. We show that it is possible to determine MNPs’ hydrodynamic radius by employing off-the-shelf electronic equipment by measuring the decrease in coil inductance when MNPs diffuse out of the coil by Brownian motion.
