, Volume 3, Issue 5, pp 307-316,
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Date: 26 Mar 2010

Electrocondensation and evaporation of attoliter water droplets: Direct visualization using atomic force microscopy

Abstract

Working with a biased atomic force microscope (AFM) tip in the tapping mode under ambient atmosphere, attoliter (10−18 L) water droplet patterns have been generated on a patterned carbonaceous surface. This is essentially electrocondensation of water leading to charged droplets, as evidenced from electrostatic force microscopy measurements. The droplets are unusual in that they exhibit a highly corrugated surface and evaporate rather slowly, taking several tens of minutes.

http://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-1034-0/MediaObjects/12274_2010_1034_Fig1_HTML.jpg