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Linking synchronization to self-assembly using magnetic Janus colloids

Journal Article · · Nature (London)
DOI:https://doi.org/10.1038/nature11619· OSTI ID:1875533
 [1];  [2];  [3];  [2];  [3]
  1. Univ. of Illinois, Urbana, IL (United States); University of Illinois
  2. Northwestern Univ., Evanston, IL (United States)
  3. Univ. of Illinois, Urbana, IL (United States)
Synchronization occurs widely in the natural and technological worlds, from the rhythm of applause and neuron firing1 to the quantum mechanics of coupled Josephson junctions2, but has not been used to produce new spatial structures. Our understanding of self-assembly has evolved independently in the fields of chemistry and materials, and with a few notable exceptions3,4 has focused on equilibrium rather than dynamical systems. Here we combine these two phenomena to create synchronization-selected microtubes of Janus colloids, micron-sized spherical particles with different surface chemistry on their opposing hemispheres, which we study using imaging and computer simulation. A thin nickel film coats one hemisphere of each silica particle to generate a discoid magnetic symmetry, such that in a precessing magnetic field its dynamics retain crucial phase freedom. Synchronizing their motion, these Janus spheres self-organize into micrometre-scale tubes in which the constituent particles rotate and oscillate continuously. In addition, the microtube must be tidally locked to the particles, that is, the particles must maintain their orientation within the rotating microtube. This requirement leads to a synchronization-induced structural transition that offers various applications based on the potential to form, disintegrate and fine-tune self-assembled in-motion structures in situ. Lastly, it offers a generalizable method of controlling structure using dynamic synchronization criteria rather than static energy minimization, and of designing new field-driven microscale devices in which components do not slavishly follow the external field.
Research Organization:
Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
National Science Foundation; US Army Research Office; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
FG02-07ER46471
OSTI ID:
1875533
Journal Information:
Nature (London), Journal Name: Nature (London) Journal Issue: 7425 Vol. 491; ISSN 0028-0836
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Oscillators that sync and swarm text January 2017
Supercolloidal Spinners: Complex Active Particles for Electrically Powered and Switchable Rotation journal July 2018
Rational Design and Synthesis of Janus Composites journal March 2014
Colloidal Superstructures Programmed into Magnetic Janus Particles journal December 2014
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Oscillators that sync and swarm journal November 2017
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Structure and phase behavior of colloidal dumbbells with tunable attractive interactions journal January 2013
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Facile colloidal coating of polystyrene nanospheres with tunable gold dendritic patches journal January 2014
The influence of shape anisotropy on the microstructure of magnetic dipolar particles journal January 2013
Rotating crystals of magnetic Janus colloids journal January 2015
Self-assembly of three-dimensional ensembles of magnetic particles with laterally shifted dipoles journal January 2016
Fabrication of Janus droplets by evaporation driven liquid–liquid phase separation journal January 2016
Design colloidal particle morphology and self-assembly for coating applications journal January 2017
Janus nanoparticles inside polymeric materials: interfacial arrangement toward functional hybrid materials journal January 2017
Active colloids with collective mobility status and research opportunities journal January 2017
A versatile colloidal Janus platform: surface asymmetry control, functionalization, and applications journal January 2018
Electrostatic-attraction-induced high internal phase emulsion for large-scale synthesis of amphiphilic Janus nanosheets journal January 2019
A platform for nanomagnetism – assembled ferromagnetic and antiferromagnetic dipolar tubes journal January 2019
Synthesis and evaluation of the SERS effect of Fe 3 O 4 –Ag Janus composite materials for separable, highly sensitive substrates journal January 2019
Magneto-capillary dynamics of amphiphilic Janus particles at curved liquid interfaces journal January 2018
Diffusiophoretic design of self-spinning microgears from colloidal microswimmers journal January 2018
Inhomogeneous assembly of driven nematic colloids journal January 2019
Bi-continuous emulsion using Janus particles journal January 2019
Recent advances in manipulation of micro- and nano-objects with magnetic fields at small scales journal January 2020
Reconfigurable assembly of charged polymer-modified Janus and non-Janus particles: from half-raspberries to colloidal clusters and chains journal January 2019
Assembled superlattice with dynamic chirality in a mixture of biased-active and passive particles journal January 2019
Non-equilibrium steady-state colloidal assembly dynamics journal May 2019
Catalytically powered dynamic assembly of rod-shaped nanomotors and passive tracer particles journal October 2013
Shape control and compartmentalization in active colloidal cells journal August 2015
Effective temperature concept evaluated in an active colloid mixture journal July 2017
Driving self-assembly and emergent dynamics in colloidal suspensions by time-dependent magnetic fields journal November 2013
Recent progress on patchy colloids and their self-assembly journal April 2013
Colloidal transport through trap arrays controlled by active microswimmers journal June 2018
Assembly of colloidal particles in solution journal October 2018
When Nonlocal Coupling between Oscillators Becomes Stronger: Patched Synchrony or Multichimera States journal May 2013
Focusing and Sorting of Ellipsoidal Magnetic Particles in Microchannels journal November 2017
Field synchronized bidirectional current in confined driven colloids journal January 2020
Reconfigurable magnetic microrobot swarm: Multimode transformation, locomotion, and manipulation journal March 2019
Sedimentation and polar order of active bottom-heavy particles journal April 2013
Tuning active emulsion dynamics via surfactants and topology journal August 2013
Non-equilibrium dynamics of magnetically anisotropic particles under oscillating fields journal July 2016
Swimming in external fields journal November 2016
Propulsion of microspheres in fluids using rotating magnetic fields journal March 2019
Pattern generation and motion control of a vortex-like paramagnetic nanoparticle swarm journal July 2018
Energy Transfer between Colloids via Critical Interactions journal February 2017
Self-Propelled Janus Microdimer Swimmers under a Rotating Magnetic Field journal November 2019
Magnetic quadrupole assemblies with arbitrary shapes and magnetizations text January 2019
Emergent collective phenomena in a mixture of hard shapes through active rotation text January 2013
Active dipole clusters: from helical motion to fission text January 2015
Hydrodynamic assembly of active colloids: chiral spinners and dynamic crystals text January 2018
Dynamics in a one-dimensional ferrogel model: relaxation, pairing, shock-wave propagation text January 2018

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