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Colloidal assembly and 3D shaping by dielectrophoretic confinement

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For decades, scientists and engineers have strived to design means of assembling colloids into ordered structures. By now, the literature is quite peppered with reports of colloidal assemblies. However, the available methods can assemble only a narrow range of structures or are applicable to specific types of colloids. There are still only few generic methods that would lead to arbitrary colloidal arrays or would shape colloidal assemblies into predesigned structures. Here, we first discuss in detail how to spatially control the assembly and crystallization of colloids through the balance of dielectrophoretic and dipolar forces. Furthermore, we demonstrate how to flexibly program and shape arrays of 3D microstructures that can be permanently affixed by in situ UV polymerization and calcination by using two facing similar or distinct micro-fabricated electrodes.

Graphical abstract: Colloidal assembly and 3D shaping by dielectrophoretic confinement

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Publication details

The article was received on 28 Feb 2017, accepted on 01 Apr 2017 and first published on 03 Apr 2017

Article type: Paper
DOI: 10.1039/C7SM00422B
Citation: Soft Matter, 2017, Advance Article
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    Colloidal assembly and 3D shaping by dielectrophoretic confinement

    A. F. Demirörs and J. J. Crassous, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM00422B

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