Interface mediated assembly and evaporation driven deposition of Janus particles

We study the self-assembly of Janus particles during the drying process inside a thin aqueous film. It has been discovered that Janus particles form unique drying patterns, which are distinctively different from those formed by homogeneous particles. By tracking both translational and rotational dynamics of Janus particles, different stages of drying process were revealed. The orientation of Janus particles are strongly influenced by the interface. The effects of drying condition, substrate and Janus balance will be discussed.