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Title: Driving self-assembly and emergent dynamics in colloidal suspensions by time-dependent magnetic fields

Journal Article · · Reports on Progress in Physics
 [1];  [2]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

In this review we discuss recent research on driving self assembly of magnetic particle suspensions subjected to alternating magnetic fields. The variety of structures and effects that can be induced in such systems is remarkably broad due to the large number of variables involved. The alternating field can be uniaxial, biaxial or triaxial, the particles can be spherical or anisometric, and the suspension can be dispersed throughout a volume or confined to a soft interface. In the simplest case the field drives the static or quasi-static assembly of unusual particle structures, such as sheets, networks and open-cell foams. More complex, emergent collective behaviors evolve in systems that can follow the time-dependent field vector. In these cases energy is continuously injected into the system and striking °ow patterns and structures can arise. In fluid volumes these include the formation of advection and vortex lattices. At air-liquid and liquid-liquid interfaces striking dynamic particle assemblies emerge due to the particle-mediated coupling of the applied field to surface excitations. These out-of-equilibrium interface assemblies exhibit a number of remarkable phenomena, including self-propulsion and surface mixing. In addition to discussing various methods of driven self assembly in magnetic suspensions, some of the remarkable properties of these novel materials are described.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1344461
Report Number(s):
SAND-2013-2161J; 597051
Journal Information:
Reports on Progress in Physics, Vol. 76, Issue 12; ISSN 0034-4885
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 98 works
Citation information provided by
Web of Science

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Emergent hydrodynamic bound states between magnetically powered micropropellers journal January 2018
Unsupervised machine learning for detection of phase transitions in off-lattice systems. II. Applications journal November 2018
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Unsupervised machine learning for detection of phase transitions in off-lattice systems. I. Foundations journal November 2018
Theoretical insight to magnetic-field-induced structural transition in two-dimensional colloidal crystal journal September 2019
Ferumoxytol of ultrahigh magnetization produced by hydrocooling and magnetically internal heating co-precipitation journal January 2018
Directing the orientational alignment of anisotropic magnetic nanoparticles using dynamic magnetic fields journal January 2015
Non-equilibrium dynamics of magnetically anisotropic particles under oscillating fields journal July 2016
Flocking ferromagnetic colloids journal February 2017
Thermal Conductivity Enhancement of Soft Polymer Composites through Magnetically Induced Percolation and Particle–Particle Contact Engineering journal January 2019
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