Rebounding droplet-droplet collisions on superhydrophobic surfaces: from the phenomenon to droplet logic

Adv Mater. 2012 Nov 8;24(42):5738-43. doi: 10.1002/adma.201202980. Epub 2012 Sep 4.


When water droplets impact each other while traveling on a superhydrophobic surface, we demonstrate that they are able to rebound like billiard balls. We present elementary Boolean logic operations and a flip-flop memory based on these rebounding water droplet collisions. Furthermore, bouncing or coalescence can be easily controlled by process parameters. Thus by the controlled coalescence of reactive droplets, here using the quenching of fluorescent metal nanoclusters as a model reaction, we also demonstrate an elementary operation for programmable chemistry.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Hydrophobic and Hydrophilic Interactions
  • Models, Theoretical
  • Surface Properties
  • Water / chemistry*


  • Water