Controllable formation of ionic liquid micro- and nanoparticles via a melt-emulsion-quench approach.

We present a facile, scalable, and general method for the size-variable generation of monodispersed, near-spherical solid-state (frozen) ionic liquid nanoparticles based on a novel melt-emulsion-quench approach. Simple manipulation of the internal templating droplets within oil-in-water (o/w) microemulsions also permits the formation of well-defined microspheres. This simple and rapid preparation, requiring neither specialized equipment nor harsh conditions, suggests a wealth of potential for these designer nanomaterials within the biomedical, materials, and analytical communities.