Suppressing the Rayleigh–Plateau Instability in Field-Directed Colloidal Assembly | Zendy

Jonathan L. Bauer | Zendy; Martin J. Kurian | Zendy; Johnathan R. Stauffer | Zendy; Eric M. Furst | Zendy

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Suppressing the Rayleigh–Plateau Instability in Field-Directed Colloidal Assembly

Author(s) -

Jonathan L. Bauer,

Martin J. Kurian,

Johnathan R. Stauffer,

Eric M. Furst

Publication year - 2016

Publication title -

langmuir

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.042

H-Index - 333

eISSN - 1520-5827

pISSN - 0743-7463

DOI - 10.1021/acs.langmuir.6b00771

Subject(s) - instability , colloid , magnetic field , rayleigh scattering , rayleigh–taylor instability , wavelength , field (mathematics) , plateau (mathematics) , phase (matter) , superparamagnetism , materials science , perpendicular , optics , condensed matter physics , physics , chemistry , mechanics , magnetization , geometry , mathematics , quantum mechanics , mathematical analysis , pure mathematics

Suspensions of superparamagnetic colloids that equilibrate in a toggled magnetic field undergo a Rayleigh-Plateau instability with a characteristic wavelength λ = 600 μm for the toggle frequency ν = 0.66 Hz. The instability is suppressed when the chamber length L in the field direction is less than 2λ. The final size of the magnetic domains perpendicular to the field, D, follows a power law relation of D ∼ L(0.71±0.07). These results demonstrate the structural differences of field-directed suspensions when confined to lengths scale set by the phase separation process and can potentially be used to create self-assembled colloidal crystals with well-defined size and shape.

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