Imaging and manipulation of nanometer-size liquid droplets by scanning polarization force microscopy
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potassium hydroxides
microscopy
images
aqueous solutions
graphite
mica
adsorption
sorptive properties
ambient temperature
wetting
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Using atomic force microscopy in noncontact mode, we have imaged nanometer-size liquid droplets of KOH water solutions on the surfaces of highly oriented pyrolitic graphite and mica. On graphite the droplets prefer to be adsorbed on atomic step edges. Droplets on the same step tend to be evenly spaced and of similar size. The droplets can be manipulated by the atomic force microscopy tip allowing the controllable formation of droplet patterns on the surface.
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Copyright (1996) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. Reprinted in Journal of Vacuum Science and Tenchnology, Volume 14, Issue 2, March 1996, pages 1341-1343. Publisher URL: http://dx.doi.org/10.1116/1.589093 NOTE: At the time of publication, author Robert W. Carpick was affiliated with the University of Wisconsin. Currently (June 2007), he is a faculty member in the Department of Mechanical Engineering and Applied Mechanics at the University of Pennsylvania.