Magnetic capture of a single magnetic nanoparticle using nanoelectromagnets

H. K. Kim, S. H. Hong, S. W. Hwang, J. S. Hwang, D. Ahn, S. Seong, T. H. Park

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We demonstrate the fabrication of nanoelectromagnets and the magnetic capture of a single magnetic nanoparticle. The magnetic nanoparticles are extracted from magnetotactic bacteria and their diameter is approximately 50 nm. We show that a single nanoparticle is captured at each corner of the serpentine-shaped nanoelectromagnet, and the maximum magnetic field of 35 mT (and the maximum magnetic-field gradient of 4× 105 Tm) is shown to be created at the capture spots of the nanoelectromagnet. It is also shown that there is a crossover between the magnetic force and the diffusion force at several hundred nm away from the magnet. This distance is comparable to the average interparticle distance.

Original languageEnglish
Article number104307
JournalJournal of Applied Physics
Issue number10
StatePublished - 15 Nov 2005


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