‘Smart’ Janus emulsions : preparation characterization and application as a template for aerogel preparation Emulsions constitute one of the most prominent and continuously evolving research areas in Colloid Chemistry which involves the preparation of mixtures or dispersions of immiscible components in a continuous medium. Besides conventional oil in water or water in oil emulsions other emulsions of complex droplet morphologies have recently attracted significant research interests. Especially Janus emulsions in which each droplet is comprised of two distinct sub regions have shown versatile potential applications. One of their advantages is the possibility of compartmentalization which enables to play with two different chemistries in a single droplet. Though microfluidic methods are conventionally used to prepare Janus emulsions their industrial applications are largely hindered by low throughput and extensive instrumentations. Recently it has been discovered that simply one pot moderate high energy emulsification is also capable of developing Janus morphology although their preparation and stabilization remain rather ...