Electrocondensation and evaporation of attoliter water droplets: Direct visualization using atomic force microscopy |
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| Authors: | Narendra Kurra Adina Scott Giridhar U. Kulkarni |
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| Affiliation: | (1) Chemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur PO, Bangalore, 560 064, India;(2) Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, USA; |
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| 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.  |
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