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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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Supplementary files

Article information


Submitted
17 Apr 2016
Accepted
03 Aug 2016
First published
03 Aug 2016

Soft Matter, 2016,12, 7186-7194
Article type
Paper
Author version available

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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