Issue 18, 2012
From the journal:

Analyst

Brownian motion-magnetophoresis of nano/micro-particles†

Makoto Kawano‡a  and  Hitoshi Watarai§*a  

* Corresponding authors

a Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan

Abstract

A new magnetophoresis method to determine the magnetic susceptibility of single nano/microparticles was developed by applying Brownian motion analysis to determine the size of the particle. This method could measure simultaneously both the magnetophoretic velocity and the radius of the identical single nano/microparticles, which are necessary for the determination of the magnetic susceptibility of the particle. The advantage of this method was demonstrated by the measurement of the diamagnetic susceptibilities of polystyrene particles 500 nm–3 μm in diameter in a paramagnetic 0.5 M manganese(II) chloride solution under a high magnetic field gradient of 5180 T2 m−1 generated by a small magnetic circuit.

Graphical abstract: Brownian motion-magnetophoresis of nano/micro-particles

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Article information

DOI
https://doi.org/10.1039/C2AN35199D
Article type
Communication
Submitted
11 Feb 2012
Accepted
13 Jul 2012
First published
27 Jul 2012

Analyst, 2012,137, 4123-4126

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Brownian motion-magnetophoresis of nano/micro-particles

M. Kawano and H. Watarai, Analyst, 2012, 137, 4123 DOI: 10.1039/C2AN35199D

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