Schematics and pictures of the glass microchannel and the PDMS microchannel.
Fabrication process of the anisotropically superhydrophobic PDMS microchannel with transverse microgrooves on the vertical walls.
SEM images of the silicon molders for the grooved superhydrophobic surfaces and the measurement of contact angles on the grooved PDMS superhydrophobic surfaces.
Picture of the superhydrophobic microchannel (top view).
Experimental microparticle image velocimetry (micro-PIV) setup.
Schematic of the microchannel (top view) showing the PIV measurement plane and the raw images in the glass, PDMS and the grooved PDMS microchannels.
Liquid meniscus on the microstructured surface with air gap in the valley between the grooves. (a) Schematic of the microscale grooves. (b) Flow in the microchannel with grooves of width , height , and pitch . (c) Flow in the microchannel with grooves of width , height , and pitch . Flow rates are for both.
Ensemble-averaged velocity vector field measured in the glass, PDMS, and the superhydrophobic PDMS microchannels. (a) Glass microchannel, (b) PDMS microchannel, (c) superhydrophobic PDMS microchannel with a groove width of and pitch of , and (d) superhydrophobic PDMS microchannel with a groove width of and pitch of .
Normalized velocity profiles for flow over the hydrophilic glass, hydrophobic PDMS, and the superhydrophobic PDMS microchannels.
Sequential images of wetting transition for various pitches in the superhydrophobic microchannel.
Geometric parameters of the groove and the wetting transition.
Slip length on a surface of the groove structure in the superhydrophobic microchannel.
Article metrics loading...
Full text loading...