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How cube-like must magnetic nanoparticles be to modify their self-assembly?

Donaldson, Joe G.; Linse, Per LU and Kantorovich, Sofia S. (2017) In Nanoscale 9(19). p.6448-6462
Abstract

Systems whose magnetic response can be finely tuned using control parameters, such as temperature and external magnetic field strength, are extremely desirable, functional materials. Magnetic nanoparticles, in particular suspensions thereof, offer opportunities for this controllability to be realised. Cube-like particles are particularly mono-disperse examples that, together with their favourable packing behaviour, make them of significant interest for study. Using a combination of analytical calculations and molecular dynamics we have studied the self-assembly of permanently magnetised dipolar superballs. The superball shape parameter was varied in order to interpolate the region between the already well-studied sphere system and that... (More)

Systems whose magnetic response can be finely tuned using control parameters, such as temperature and external magnetic field strength, are extremely desirable, functional materials. Magnetic nanoparticles, in particular suspensions thereof, offer opportunities for this controllability to be realised. Cube-like particles are particularly mono-disperse examples that, together with their favourable packing behaviour, make them of significant interest for study. Using a combination of analytical calculations and molecular dynamics we have studied the self-assembly of permanently magnetised dipolar superballs. The superball shape parameter was varied in order to interpolate the region between the already well-studied sphere system and that of the recently investigated cube. Our findings show that as a superball particle becomes more cubic the chain to ring transition, observed in the ground state of spherical particles, occurs at an increasingly larger cluster size. This effect is mitigated, however, by the appearance of a competing configuration; asymmetric rings, a conformation that we show superballs can readily adopt.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
9
issue
19
pages
15 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85021835044
  • wos:000401649700027
ISSN
2040-3364
DOI
10.1039/c7nr01245d
language
English
LU publication?
yes
id
b42882c4-259b-4f7b-8ad7-3dbcce43f1e7
date added to LUP
2017-07-19 10:56:12
date last changed
2017-09-18 11:38:41
@article{b42882c4-259b-4f7b-8ad7-3dbcce43f1e7,
  abstract     = {<p>Systems whose magnetic response can be finely tuned using control parameters, such as temperature and external magnetic field strength, are extremely desirable, functional materials. Magnetic nanoparticles, in particular suspensions thereof, offer opportunities for this controllability to be realised. Cube-like particles are particularly mono-disperse examples that, together with their favourable packing behaviour, make them of significant interest for study. Using a combination of analytical calculations and molecular dynamics we have studied the self-assembly of permanently magnetised dipolar superballs. The superball shape parameter was varied in order to interpolate the region between the already well-studied sphere system and that of the recently investigated cube. Our findings show that as a superball particle becomes more cubic the chain to ring transition, observed in the ground state of spherical particles, occurs at an increasingly larger cluster size. This effect is mitigated, however, by the appearance of a competing configuration; asymmetric rings, a conformation that we show superballs can readily adopt.</p>},
  author       = {Donaldson, Joe G. and Linse, Per and Kantorovich, Sofia S.},
  issn         = {2040-3364},
  language     = {eng},
  month        = {05},
  number       = {19},
  pages        = {6448--6462},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale},
  title        = {How cube-like must magnetic nanoparticles be to modify their self-assembly?},
  url          = {http://dx.doi.org/10.1039/c7nr01245d},
  volume       = {9},
  year         = {2017},
}