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Self-rolled polymer film: a route to microfluidic devices

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Abstract

Self-enrolment is a well-known instability driven by stress inhomogeneity in thin film. Such folding of flat surfaces-which can be previously treated or patterned-into a tube present a great potential of application in microfluidics as the patterning of channel inner surfaces becomes of greater importance for a lot of practical aspects. We investigate the case of PDMS-based bilayer. The instability is driven by PDMS swelling in solvent vapors. The second layer-responsible of the inhomogeneity-can be another harder material. We present two different cases where i-the hard layer is another thin film polymer deposited on the pdms and ii-the hard layer is made by the oxidation of the pdms layer itself. This last case is of main interest since it is the way used for soft-lithography. In Figure 1, we report the inner diameter of self-rolled films as a function of the total bilayer thickness: tubes as small as 25$\mu$m are achieved.
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Dates and versions

cea-02351474 , version 1 (06-11-2019)

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  • HAL Id : cea-02351474 , version 1

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R Brossard, B. Sarrazin, P. Guenoun, F. Malloggi. Self-rolled polymer film: a route to microfluidic devices. Biosensors 2016, May 2016, Göteborg, Sweden. ⟨cea-02351474⟩
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