Research Article

Nano Research

, Volume 3, Issue 5, pp 307-316

Open Access This content is freely available online to anyone, anywhere at any time.

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

  • Narendra KurraAffiliated withChemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research
  • , Adina ScottAffiliated withBirck Nanotechnology Center, Purdue University
  • , Giridhar U. KulkarniAffiliated withChemistry and Physics of Materials Unit and DST Unit on Nanoscience, Jawaharlal Nehru Centre for Advanced Scientific Research Email author 

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

Keywords

Electrocondensation attoliter water droplets biased atomic force microscope (AFM) lithography electron beam induced deposition carbonaceous deposition