Dynamics of the field-induced formation of hexagonal zipped-chain superstructures in magnetic colloids

D. Heinrich; A. R. Goñi; A. Smessaert; S. H.L. Klapp; L. M.C. Cerioni; T. M. Osán; D. J. Pusiol; C. Thomsen

doi:10.1103/PhysRevLett.106.208301

Dynamics of the field-induced formation of hexagonal zipped-chain superstructures in magnetic colloids

D. Heinrich, A. R. Goñi, A. Smessaert, S. H.L. Klapp, L. M.C. Cerioni, T. M. Osán, D. J. Pusiol, C. Thomsen

Research output: Contribution to journal › Article › Research › peer-review

38 Citations (Scopus)

Abstract

Combining nuclear magnetic resonance and molecular dynamics simulations, we unravel the long-time dynamics of a paradigmatic colloid with strong dipole-dipole interactions. In a homogeneous magnetic field, ionic ferrofluids exhibit a stepwise association process from ensembles of monomers over stringlike chains to bundles of hexagonal zipped-chain patches. We demonstrate that attractive van der Waals interactions due to charge-density fluctuations in the magnetic particles play the key role for the dynamical stabilization of the hexagonal superstructures against thermal dissociation. Our results give insight into the dynamics of self-organization in systems dominated by dipolar interactions. © 2011 American Physical Society.

Original language	English
Article number	208301
Journal	Physical Review Letters
Volume	106
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.106.208301
Publication status	Published - 20 May 2011

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title = "Dynamics of the field-induced formation of hexagonal zipped-chain superstructures in magnetic colloids",

abstract = "Combining nuclear magnetic resonance and molecular dynamics simulations, we unravel the long-time dynamics of a paradigmatic colloid with strong dipole-dipole interactions. In a homogeneous magnetic field, ionic ferrofluids exhibit a stepwise association process from ensembles of monomers over stringlike chains to bundles of hexagonal zipped-chain patches. We demonstrate that attractive van der Waals interactions due to charge-density fluctuations in the magnetic particles play the key role for the dynamical stabilization of the hexagonal superstructures against thermal dissociation. Our results give insight into the dynamics of self-organization in systems dominated by dipolar interactions. {\textcopyright} 2011 American Physical Society.",

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Dynamics of the field-induced formation of hexagonal zipped-chain superstructures in magnetic colloids. / Heinrich, D.; Goñi, A. R.; Smessaert, A.; Klapp, S. H.L.; Cerioni, L. M.C.; Osán, T. M.; Pusiol, D. J.; Thomsen, C.

In: Physical Review Letters, Vol. 106, No. 20, 208301, 20.05.2011.

Research output: Contribution to journal › Article › Research › peer-review

TY - JOUR

T1 - Dynamics of the field-induced formation of hexagonal zipped-chain superstructures in magnetic colloids

AU - Heinrich, D.

AU - Goñi, A. R.

AU - Smessaert, A.

AU - Klapp, S. H.L.

AU - Cerioni, L. M.C.

AU - Osán, T. M.

AU - Pusiol, D. J.

AU - Thomsen, C.

PY - 2011/5/20

Y1 - 2011/5/20

N2 - Combining nuclear magnetic resonance and molecular dynamics simulations, we unravel the long-time dynamics of a paradigmatic colloid with strong dipole-dipole interactions. In a homogeneous magnetic field, ionic ferrofluids exhibit a stepwise association process from ensembles of monomers over stringlike chains to bundles of hexagonal zipped-chain patches. We demonstrate that attractive van der Waals interactions due to charge-density fluctuations in the magnetic particles play the key role for the dynamical stabilization of the hexagonal superstructures against thermal dissociation. Our results give insight into the dynamics of self-organization in systems dominated by dipolar interactions. © 2011 American Physical Society.

AB - Combining nuclear magnetic resonance and molecular dynamics simulations, we unravel the long-time dynamics of a paradigmatic colloid with strong dipole-dipole interactions. In a homogeneous magnetic field, ionic ferrofluids exhibit a stepwise association process from ensembles of monomers over stringlike chains to bundles of hexagonal zipped-chain patches. We demonstrate that attractive van der Waals interactions due to charge-density fluctuations in the magnetic particles play the key role for the dynamical stabilization of the hexagonal superstructures against thermal dissociation. Our results give insight into the dynamics of self-organization in systems dominated by dipolar interactions. © 2011 American Physical Society.

U2 - 10.1103/PhysRevLett.106.208301

DO - 10.1103/PhysRevLett.106.208301

M3 - Article

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