Let assemblies bloom

Stefano Tonzani

Nature, 2009, vol. 457, issue 7232, 974-974

Abstract: A flowering of colloids The controlled assembly of complex structures from simple colloidal building blocks can produce materials with properties useful in photonics, as biological sensors and elsewhere. A new method of assembling complex colloidal structures in bulk fluid by applying a magnetic field to a mixture of colloidal particles of different size, magnetization and composition is now reported. The shapes that can be obtained when these particles are suspended in a ferromagnetic fluid resemble electric charge distributions such as quadrupoles and octupoles, generating a variety of complex structures including ring- and flower-shaped assemblies. The repulsion that exists between two assembled particles also prevents the formation of clusters.

Date: 2009
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DOI: 10.1038/457974a

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