T. Pompe et al., Measurement of contact line tension by analysis of the three-phase boundary with nanometer resolution, J ADHES SCI, 13(10), 1999, pp. 1155-1164
Liquid structures on solid substrates have been imaged with a resolution in
the nanometer range by scanning force microscopy in the tapping mode. Usin
g substrates with an artificially patterned wettability, characteristic fea
tures in the three-phase contact line were induced, which allow the contact
line tension to be determined. The values in the range of -1 x 10(-10) N o
btained for sessile droplets of hexaethylene glycol are consistent with the
oretical predictions.