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Scanning probe microscope images of the crosssectional profiles for a partially wetting nanoink pattern before shrinking (circles) and after being shrunk (squares). The wetting angle is 5.7° and 11.3° for before and after dewetting, respectively.
A series of optical microscope images of the nanofluidic pattern, showing the dewetting. The whole process lasts only for about .
(a) An optical microscope image showing a nanoink line that deformed into bulges. The bulges are connected via a thin thread. (b) An optical microscope image showing a ringlike pattern after heating under a water droplet.
The time evolution of the nanoink line width. The first part of the graph corresponds to the thinning of the line. In the second phase, the nanoink line shrinks. Convection cells in the water droplet and thermocapillary forces at the nanoink-water interface trigger the receding motion of the contact line. In the last phase, the receding motion of the contact line is stopped by an increasing viscous force.
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