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Issue 34, 2016
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Let's twist again: elasto-capillary assembly of parallel ribbons

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Abstract

We show the self-assembly through twisting and bending of side by side ribbons under the action of capillary forces. Micro-ribbons made of silicon nitride are batch assembled at the wafer scale. We study their assembly as a function of their dimensions and separating distance. Model experiments are carried out at the macroscopic scale where the tension in ribbons can easily be tuned. The process is modeled considering the competition between capillary, elastic and tension forces. Theory shows a good agreement for macroscale assemblies, while the accuracy is within 30% at the micrometer scale. This simple self-assembly technique yields highly symmetric and controllable structures which could be used for batch fabrication of functional 3D micro-structures.

Graphical abstract: Let's twist again: elasto-capillary assembly of parallel ribbons

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Publication details

The article was received on 17 Apr 2016, accepted on 03 Aug 2016 and first published on 03 Aug 2016


Article type: Paper
DOI: 10.1039/C6SM00910G
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Soft Matter, 2016,12, 7186-7194

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    Let's twist again: elasto-capillary assembly of parallel ribbons

    A. Legrain, E. J. W. Berenschot, L. Abelmann, J. Bico and N. R. Tas, Soft Matter, 2016, 12, 7186
    DOI: 10.1039/C6SM00910G

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