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Sensors 2013, 13(6), 6900-6909; doi:10.3390/s130606900
Article

A Solid State Nanopore Device for Investigating the Magnetic Properties of Magnetic Nanoparticles

1,* , 1
,
1
,
2
 and
1,2,*
1 Advanced Institutes of Convergence Technology, Suwon 443-270, Korea 2 Department of Transdisciplinary Studies, Seoul National University, Seoul 151-742, Korea
* Authors to whom correspondence should be addressed.
Received: 29 March 2013 / Revised: 14 April 2013 / Accepted: 17 May 2013 / Published: 24 May 2013
(This article belongs to the Section Physical Sensors)
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Abstract

In this study, we explored magnetic nanoparticles translocating through a nanopore in the presence of an inhomogeneous magnetic field. By detecting the ionic current blockade signals with a silicon nitride nanopore, we found that the translocation velocity that is driven by magnetic and hydrodynamic forces on a single magnetic nanoparticle can be accurately determined and is linearly proportional to the magnetization of the magnetic nanoparticle. Thus, we obtained the magneto-susceptibility of an individual nanoparticle and the average susceptibility over one hundred particles within a few minutes.
Keywords: nanopore; magnetic nanoparticle; ion current blockade; magneto-susceptibility nanopore; magnetic nanoparticle; ion current blockade; magneto-susceptibility
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Park, S.; Lim, J.; Pak, Y.E.; Moon, S.; Song, Y.-K. A Solid State Nanopore Device for Investigating the Magnetic Properties of Magnetic Nanoparticles. Sensors 2013, 13, 6900-6909.

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