Branched networks by directed assembly of shape anisotropic magnetic particles

Priyadarshi Panda, Ki Wan Bong, T. Alan Hatton, Patrick S. Doyle

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The directed assembly of shape anisotropic magnetic particles into targeted macrostructures requires judicious particle design. We present a framework to understand the self-assembly of magnetic non-Brownian H-shaped particles and the formation of branched networks under an applied magnetic field. A finite element integration (FEI) method is developed to identify the preferred particle orientation (relative to the applied field) at different values of the geometric parameters defining H shapes, and used to construct a phase diagram to generalize the results. Theoretical predictions are validated by comparing with experiments performed using magnetic hydrogels synthesized using stop-flow lithography (SFL). We demonstrate the ability of H-shaped particles to form chains parallel to the field that can thicken in a direction orthogonal to the field, and in some cases with branching. The assembly of a suspension containing H-shaped particles, or rods, or a combination of both, is reported.

Original languageEnglish
Pages (from-to)13428-13435
Number of pages8
JournalLangmuir
Volume27
Issue number22
DOIs
Publication statusPublished - 2011 Nov 15
Externally publishedYes

Fingerprint

Hydrogels
Magnetic Fields
Suspensions
assembly
Self assembly
Lithography
Phase diagrams
Magnetic fields
Experiments
Direction compound
self assembly
rods
lithography
phase diagrams
predictions
magnetic fields

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Branched networks by directed assembly of shape anisotropic magnetic particles. / Panda, Priyadarshi; Bong, Ki Wan; Hatton, T. Alan; Doyle, Patrick S.

In: Langmuir, Vol. 27, No. 22, 15.11.2011, p. 13428-13435.

Research output: Contribution to journalArticle

Panda, Priyadarshi ; Bong, Ki Wan ; Hatton, T. Alan ; Doyle, Patrick S. / Branched networks by directed assembly of shape anisotropic magnetic particles. In: Langmuir. 2011 ; Vol. 27, No. 22. pp. 13428-13435.
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