Issue 42, 2011
From the journal:

Journal of Materials Chemistry

Self-assembly and flux closure studies of magnetic nanoparticle rings†

Alexander Wei,*ab   Takeshi Kasamac  and  Rafal E. Dunin-Borkowskic  

* Corresponding authors

a Department of Chemistry, Purdue University, 560 Oval Dr., West Lafayette, IN, USA
E-mail: alexwei@purdue.edu
Fax: +1-765-494-0239
Tel: +1-765-494-5257

b Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA

c Center for Electron Nanoscopy, Technical University of Denmark, Kongens, Lyngby, Denmark

Abstract

Thermoremanent magnetic nanoparticles (MNPs) can self-assemble into rings through dipolar interactions, when dispersed under appropriate conditions. Analysis of individual MNP rings and clusters by off-axis electron holography reveals bistable flux closure (FC) states at ambient temperatures, and their reversible switching by magnetic field gradients. We introduce a line-bond formalism to describe the coupling between MNPs.

Graphical abstract: Self-assembly and flux closure studies of magnetic nanoparticle rings

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Article information

DOI
https://doi.org/10.1039/C1JM11916H
Article type
Feature Article
Submitted
02 May 2011
Accepted
09 Aug 2011
First published
06 Sep 2011

J. Mater. Chem., 2011,21, 16686-16693

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Self-assembly and flux closure studies of magnetic nanoparticle rings

A. Wei, T. Kasama and R. E. Dunin-Borkowski, J. Mater. Chem., 2011, 21, 16686 DOI: 10.1039/C1JM11916H

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