Engineering the surface properties of microfluidic stickers
Lab Chip. 2012-01-01; 12(17): 3028
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1. Lab Chip. 2012 Sep 7;12(17):3028-31. doi: 10.1039/c2lc40284j.
Engineering the surface properties of microfluidic stickers.
Levaché B(1), Azioune A, Bourrel M, Studer V, Bartolo D.
(1)Laboratoire PMMH, ESPCI ParisTech, CNRS UMR 7636, Université Pierre et Marie
Curie et Université Paris Diderot, 10, rue Vauquelin 75005, Paris, France.
We introduce a simple and effective method to tailor the wetting and adhesion
properties of thiolene-based microfluidic devices. This one-step lithographic
scheme combines most of the advantages offered by the current methods employed to
pattern microchannels: (i) the channel walls can be modified in situ or ex situ,
(ii) their wettability can be varied in a continuous manner, (iii) heterogeneous
patterning can be easily accomplished, with contact-angle contrasts extending
from 0 to 90° for pure water, (iv) the surface modification has proven to be
highly stable upon aging and heating. We first characterize the wetting
properties of the modified surfaces. We then provide the details of two
complementary methods to achieve surface patterning. Finally, we demonstrate the
two methods with three examples of applications: the capillary guiding of fluids,
the production of double emulsions, and the culture of cells on adhesive
PMID: 22855124 [Indexed for MEDLINE]