From transient nanodroplets to permanent nanolenses

Nanodroplets can be conveniently produced by the established protocol, called the solvent exchange. In this work, the transient nanodroplets were converted to permanent polymeric nanolenses by forming nanodroplets of monomers followed by in situ photopolymerization. This method could produce nanolenses with desired single or multiple components over a large area on both planar and non-planar surfaces. The morphology (average size and height/lateral size ratio) and the components of nanolenses could be controlled by the characteristics of the nanodroplets.