Investigation of individual identification method using magnetism for aquatic organisms

Abstract

For this study, we propose a novel sensing system for biometric identification within short time under wet environment. For this purpose, we prepared multiple nanoparticle samples to be embedded and examined the factors that effect of the magnetically-induced heat generation. As a result, in the exothermic experiment of particles in liquid, the exotherm was remarkable in the sample with high particle concentration. This suggests that Brownian relaxation is likely to be dominated. In addition, heat generation was confirmed in the heating experiment of the dried particles, and it was shown that the superparamagnetic particles are likely to generate heat due to Neel relaxation in the fixed state. This research contributes to environmental technology and sensing / tracing technology.