Taming contact line instability for pattern formation
Langue
en
Article de revue
Ce document a été publié dans
Nature Communications. 2016-08-10, vol. 7, p. 12458 (1-7)
Nature Publishing Group
Résumé en anglais
Coating surfaces with different fluids is prone to instability producing inhomogeneous films and patterns. The contact line between the coating fluid and the surface to be coated is host to different instabilities, limiting ...Lire la suite >
Coating surfaces with different fluids is prone to instability producing inhomogeneous films and patterns. The contact line between the coating fluid and the surface to be coated is host to different instabilities, limiting the use of a variety of coating techniques. Here we take advantage of the instability of a receding contact line towards cusp and droplet formation to produce linear patterns of variable spacings. We stabilize the instability of the cusps towards droplet formation by using polymer solutions that inhibit this secondary instability and give rise to long slender cylindrical filaments. We vary the speed of deposition to change the spacing between these filaments. The combination of the two gives rise to linear patterns into which different colloidal particles can be embedded, long DNA molecules can be stretched and particles filtered by size. The technique is therefore suitable to prepare anisotropic structures with variable properties.< Réduire
Project ANR
Initiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
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Importé de halUnités de recherche