Electrostatic water droplet formation in oil in microchannel system

Michihiko Nakano, Kazunori Takashima, Shinji Katsura, Akira Mizuno

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


We have investigated that a droplet-based microreactor system, such as Lab-on-a-chip, especially for using no mechanical pump. In this paper, a method to produce water droplets in oil electrically was experimented. Electrostatic atomization was studied to inject charged water droplets into oil in a microchannel system. When a negative DC voltage (-7 kV) was applied to Milli-Q water phase of microchannel, Taylor cone was formed at an interface between the water and rapeseed oil, and the water droplets were injected into oil. A diameter of the produced droplets was characterized to 10.7 ± 3.8 μm. When Milli-Q water replaced to 50% glycerol that was 6 times higher viscous liquid, the produced droplets were with 6.7 ± 2 μm. Since the electrostatic atomization, in principle, produces charged droplets into oil, the produced droplets will be manipulated using electric force.

Original languageEnglish
Pages (from-to)918-921
Number of pages4
Issue number11
Publication statusPublished - Nov 20 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Chemistry(all)


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