TY - JOUR
T1 - Rotating crystals of magnetic Janus colloids
AU - Yan, J.
AU - Bae, S. C.
AU - Granick, S.
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2015/1/7
Y1 - 2015/1/7
N2 - Monodisperse magnetic colloids are found to self-assemble into unusual crystals in the presence of rotating magnetic fields. First, we confirm a predicted phase transition (S. Jäger and S. H. L. Klapp, Soft Matter, 2011, 7, 6606-6616), directly coupled to the dynamic transition of single particle motion, from a disordered state to a hexagonal crystal. Next, going beyond what had been predicted, we report how hydrodynamic coupling produces shear melting, dislocations, and periodically mobile domain boundaries. These uniform magnetic colloids, whose structures are modulated in situ using the protocols described here, demonstrate a strategy of stimulus-response in the colloid domain with potential applications.
AB - Monodisperse magnetic colloids are found to self-assemble into unusual crystals in the presence of rotating magnetic fields. First, we confirm a predicted phase transition (S. Jäger and S. H. L. Klapp, Soft Matter, 2011, 7, 6606-6616), directly coupled to the dynamic transition of single particle motion, from a disordered state to a hexagonal crystal. Next, going beyond what had been predicted, we report how hydrodynamic coupling produces shear melting, dislocations, and periodically mobile domain boundaries. These uniform magnetic colloids, whose structures are modulated in situ using the protocols described here, demonstrate a strategy of stimulus-response in the colloid domain with potential applications.
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U2 - 10.1039/c4sm01962h
DO - 10.1039/c4sm01962h
M3 - Article
C2 - 25372218
AN - SCOPUS:84949115779
SN - 1744-683X
VL - 11
SP - 147
EP - 153
JO - Soft Matter
JF - Soft Matter
IS - 1
ER -