Lee, Jong-Chul Lee, Sangyoup 2024-01-20T11:33:33Z 2024-01-20T11:33:33Z 2021-09-05 2013-09 1533-4880 https://pubs.kist.re.kr/handle/201004/127710 Magnetic fluid is a stable colloidal mixture contained magnetic nanoparticles coated with a surfactant. Recently, it was found that the fluid has properties to increase heat transfer and dielectric characteristics due to the added magnetic nanoparticles in transformer oils. The magnetic nanoparticles in the fluid experience an electrical force directed toward the place of maximum electric field strength when the electric field is applied. And when the external magnetic field is applied, the magnetic nanoparticles form long chains oriented along the direction of the field. The behaviors of magnetic nanoparticles in both the fields must play an important role in changing the heat transfer and dielectric characteristics of the fluids. In this study, we visualized the movement of magnetic nanoparticles influenced by both the fields applied in-situ. It was found that the magnetic nanoparticles travel in the region near the electrode by the electric field and form long chains along the field direction by the magnetic field. It can be inferred that the movement of magnetic nanoparticles appears by both the fields, and the breakdown voltage of transformer oil based magnetic fluids might be influenced according to the dispersion of magnetic nanoparticles. English AMER SCIENTIFIC PUBLISHERS Dielectrophoresis-Magnetophoresis Force Driven Magnetic Nanoparticle Movement in Transformer Oil Based Magnetic Fluids Article 10.1166/jnn.2013.7665 1 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.13, no.9, pp.6179 - 6182 JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 13 9 6179 6182 scie scopus 000323628900043 2-s2.0-84885439438 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article Magnetic Nanoparticle Dielectrophoresis Magnetophoresis Dielectric Breakdown Voltage Microchannel