Fig. 5
Comparison of experimental AFM cross section (blue dashed line) for Sylgard 184 (top) and Sylgard 186 (bottom) and theoretical prediction (red line) for different droplet radii decreasing from left to right. The position of the TPCL is shown using a dot and the inset shows a close-up of the liquid-substrate interface. The horizontal dotted line shows the undeformed PS-PDMS/undeformed PDMS-air interface assumed at exactly \(z=7\,\upmu \text {m}\). The slight roughness of the PS-PDMS interface has an amplitude \(\pm 10\) nm independent on the drop size and becomes more visible on a smaller (relative) droplet scale.
