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Corner liquid imbibition during capillary penetration in lithographically made microchannels

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6 Author(s)
Girardo, S. ; NNL, National Nanotechnology Laboratory of INFM-CNR, Distretto Tecnologico, Università del Salento, via Arnesano, I-73100 Lecce, Italy ; Cingolani, R. ; Chibbaro, S. ; Diotallevi, F.
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The authors investigate the formation of liquid layers at corners of lithographically made microchannels during capillary filling. The microflow and shape of the liquid-air interface is studied through an optically transparent microfluidic device. The experimental findings at early stages of layer formation are supported by three-dimensional lattice Boltzmann simulations, allowing to predict the shape and dynamics of the corner films and highlighting their dependence on the fluid contact angle.

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Applied Physics Letters  (Volume:94 ,  Issue: 17 )