CORE-SHELL STRUCTURE AND THE RADIOACTIVE HETERONUCLIDE NANOPARTICLES, AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A hetero-nuclide radioactive isotope nanoparticle with a core-shell structure capable of being used as a tracer for sensing a change in a volume ratio or evaluating behavior characteristics of water resources through information on an aspect ratio in the flow of a multiphase fluid existing in an in-line part operating at a high temperature or a high pressure by comprising the hetero-nuclide radioactive isotope nanoparticle as a core. CONSTITUTION: A hetero-nuclide radioactive isotope nanoparticle with a core-shell structure includes two different kinds of particles as a core, and SiO2 surrounds the core. The two kinds of particles are selected from a group comprising 198Au, 63Ni, 110mAg, 64Cu, 60Co, 192Ir, and 103Pd. A manufacturing method for the hetero-nuclide radioactive isotope nanoparticle with the core-shell structure comprises the following steps of: (i) manufacturing the core of a hetero-nuclide radioactive isotope nanoparticle by dispersing two different kinds of particles selected from a group comprising Au, Ni, Ag, Cu, Co, Ir, and Pd into water, and stabilizing with a colloid stabilizer; (ii) manufacturing the nanoparticle with the core-shell structure by coating SiO2 on the core of the nanoparticle from step(i) several times; (iii) removing the colloid stabilizer remaining in the core-shell structure by sintering the nanoparticle with the core-shell structure from step(ii); and (iv) radioactivating the nanoparticle in the core by irradiating neutrons to the core-shell structure from step(iii).