Observation of hydrophobic-like behavior in geometrically patterned hydrophilic microchannels |
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| Authors: | Parikesit G O F Vrouwe E X Blom M T Westerweel J |
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| Institution: | 1Laboratory for Aero and Hydrodynamics, Delft University of Technology, 2628 CA Delft, The Netherlands;2Department of Engineering Physics, Faculty of Engineering, Gadjah Mada University, Yogyakarta 55281, Indonesia;3Micronit Microfluidics BV, 7521 PV Enschede, The Netherlands |
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| Abstract: | We present our observation of meta-hydrophobicity, where geometrically patterned surfaces make hydrophilic microchannels exhibit hydrophobic-like behaviors. We analyze the wetting-induced energy decrease that results from the surface geometries and experimentally demonstrate how those geometries can modulate the dynamics of capillary-driven wetting and evaporation-driven drying of microfluidic systems. Our results also show that the modulated wetting dynamics can be employed to generate regulated patterns of microbubbles. |
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