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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 (CC BY 3.0).
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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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