The masking process among the techniques is the most flexible as it is capable of modifying the nanocrystal's surfaces with a huge variety of functional groups. As such, the mechanism of this technique can be described as the trapping of nanoparticles at the interface between two fluid phases, or depositing or adsorbing them on a solid surface . Obtaining Janus-like nanoparticles through phase separation is normally used for inorganic materials, being recently applied to polymeric materials as well as to hybrid organic/inorganic materials. This technique stands out for the possibility of obtaining complex structures with advanced functionality .