Patterning of spontaneous rolling thin polymer films for versatile microcapillariesReport as inadecuate

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1 LIONS - Laboratoire Interdisciplinaire sur l-Organisation Nanométrique et Supramoléculaire IRAMIS - Institut Rayonnement Matière de Saclay, NIMBE - Nanosciences et Innovation pour les Matériaux, la Biomédecine et l-Energie ex SIS2M 2 UMR 7361 - Institut de Science des Matériaux de Mulhouse

Abstract : We investigate the spontaneous rolling of polydimethylsiloxanePDMS thin films and demonstrate the fabrication of capillaries with topographical and chemical patterns on the inner wall. Thin films of polydimethylsiloxanePDMS are either coated by a layer of hard material or have their surface hardened by plasma oxidation. They are then driven out of equilibrium by selective solvent swelling in vapor phase resulting in a tubular rolled-up system. The inner diameter of those is measured as a function of layer thickness for different solvents and capping types. Those results are shown to be in good agreement with Timoshenko theory. Before rolling, the future inner surface can be characterized and functionnalized. We demonstrate topographical and chemical patterning, respectively by embossing and microcontact printing. These methods are very simple and can easily produce cylindrical capillaries with inner diameter between 20 and some hundreds of microns with fully functionnalized inner surface, overcoming many difficulties encountered in conventional soft lithography techniques.

Keywords : Self-rolling Microfabrication Polydimethylsiloxane Patterning Microfluidics Microcapillary

Author: Rémy Brossard - Valeriy Luchnikov - Patrick Guenoun - Florent Malloggi -



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