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

Abstract

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
Volume98
Issue number10
DOIs
StatePublished - 15 Nov 2005

Bibliographical note

Funding Information:
This work was supported by the Korean Ministry of Science and Technology through the Creative Research Initiative Program under Contract No. R16-1998-009-01001-0. The work at Korea University was supported by the Brain Korea 21 Project in 2004.

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