Redistribution of charged aluminum nanoparticles on oil droplets in water in response to applied electrical field

  • Mengqi Li
  • Dongqing LiEmail author
Research Paper


Janus droplets with two opposite faces of different physical or chemical properties have great potentials in many fields. This paper reports a new method for making Janus droplets by covering one side of the droplet with charged nanoparticles in an externally applied DC electric field. In this paper, aluminum oxide nanoparticles on micro-sized and macro-sized oil droplets were studied. In order to control the surface area covered by the nanoparticles on the oil droplets, the effects of the concentration of nanoparticle suspension, the droplet size as well as the strength of electric field on the final accumulation area of the nanoparticles are studied.

Graphical abstract


Janus droplet Charged nanoparticles Electrical field Particle redistribution Oil droplet in water 



The authors thank the Natural Sciences and Engineering Research Council (NSERC) of Canada for the financial support given to D. Li through a research grant.


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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  1. 1.Department of Mechanical and Mechatronics EngineeringUniversity of WaterlooWaterlooCanada
  2. 2.WaterlooCanada

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