Nano Archive

On the magnetic field architecture required to capture superparamagnetic nanoparticles in a microcapillary flow

Darton, Nicholas J. and Hallmark, Bart and Agrawal, Pulkit and James, Tom and Ho, Vincent H. B. and Slater, Nigel K. H. (2009) On the magnetic field architecture required to capture superparamagnetic nanoparticles in a microcapillary flow. Journal of Nanoparticle Research, 12 (1). pp. 307-317. ISSN 1388-0764 (Print) 1572-896X (Online)

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Official URL: http://www.springerlink.com/content/a6u77g750777kj...

Abstract

The magnetic field required for the capture of superparamagnetic nanoparticles flowing in a microcapillary array under a constant pressure regime was investigated in vitro. It was found that the nanoparticles were captured in locations that varied significantly in magnetic field strength, and that the location of capture was strongly related to the net volumetric flow through the microcapillary array. A hypothesis is presented to explain these data in which the magnetic field of the trapping Neodymium Iron Boron (NdFeB) block magnet is divided into two zones that act differently on the nanoparticles. In the first ‘steering zone’, nanoparticles are moved closer to the capillary wall where they can be captured downstream in the second ‘capture zone’. This hypothesis can be used in the future to design magnetic field shapes for more effective particle capture at higher flow rates with lower field strengths.

Item Type:Article
Uncontrolled Keywords:Superparamagnetic nanoparticles - Microcapillary flow - In-flow capture - Magnetic field optimisation - Nanobiotechnology - Nanomedicine
Subjects:Physical Science > Nanomagnetics
Biomedical Science > Nanotechnology for human health
Biomedical Science > Nanomedicine
ID Code:8119
Deposited By:IoN
Deposited On:12 Mar 2010 15:36
Last Modified:12 Mar 2010 15:36

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