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Binary colloidal structures assembled through Ising interactions

Publication ,  Journal Article
Khalil, KS; Sagastegui, A; Li, Y; Tahir, MA; Socolar, JES; Wiley, BJ; Yellen, BB
Published in: Nature Communications
2012

New methods for inducing microscopic particles to assemble into useful macroscopic structures could open pathways for fabricating complex materials that cannot be produced by lithographic methods. Here we demonstrate a colloidal assembly technique that uses two parameters to tune the assembly of over 20 different pre-programmed structures, including kagome, honeycomb and square lattices, as well as various chain and ring configurations. We programme the assembled structures by controlling the relative concentrations and interaction strengths between spherical magnetic and non-magnetic beads, which behave as paramagnetic or diamagnetic dipoles when immersed in a ferrofluid. A comparison of our experimental observations with potential energy calculations suggests that the lowest energy configuration within binary mixtures is determined entirely by the relative dipole strengths and their relative concentrations.

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Published In

Nature Communications

DOI

Publication Date

2012

Volume

3

Start / End Page

794
 

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Khalil, K. S., Sagastegui, A., Li, Y., Tahir, M. A., Socolar, J. E. S., Wiley, B. J., & Yellen, B. B. (2012). Binary colloidal structures assembled through Ising interactions. Nature Communications, 3, 794. https://doi.org/10.1038/ncomms1798
Khalil, Karim S., Amanda Sagastegui, Yu Li, Mukarram A. Tahir, Joshua E. S. Socolar, Benjamin J. Wiley, and Benjamin B. Yellen. “Binary colloidal structures assembled through Ising interactions.” Nature Communications 3 (2012): 794. https://doi.org/10.1038/ncomms1798.
Khalil KS, Sagastegui A, Li Y, Tahir MA, Socolar JES, Wiley BJ, et al. Binary colloidal structures assembled through Ising interactions. Nature Communications. 2012;3:794.
Khalil, Karim S., et al. “Binary colloidal structures assembled through Ising interactions.” Nature Communications, vol. 3, 2012, p. 794. Manual, doi:10.1038/ncomms1798.
Khalil KS, Sagastegui A, Li Y, Tahir MA, Socolar JES, Wiley BJ, Yellen BB. Binary colloidal structures assembled through Ising interactions. Nature Communications. 2012;3:794.

Published In

Nature Communications

DOI

Publication Date

2012

Volume

3

Start / End Page

794