Controlling microdroplet formation by light.

  title={Controlling microdroplet formation by light.},
  author={Greg M{\"o}ller and Megha Harke and Dietrich Prescher and Hubert R. Motschmann},
A surface with photocontrollable wetting behavior is introduced. A monolayer of a polymeric material containing 4'-[trifluoromethoxy-4,4'-dibenzoazo dyes in the side chains has been transferred on quartz slides and silicon wafer. The azobenzene chromophore possesses two distinct isomers, cis and trans. Transition between these states can be triggered by illumination with light of two different wavelengths. It will be demonstrated that with the use of light and a mask, fine cis-trans patterns on… CONTINUE READING