Fig. 2. Schematic structure of a section of a fluorous emulsion nanoparticle. (A ) The original linear diblock copolymer forms a polymer shell around the fluorous particle that allows easy diffusion of anesthetic molecule in solution. This phenomenon leads to the growth of the nanoparticles volume and destabilizes the emulsion. (B ) The use of a smaller polyethylene glycol and a much bulkier fluorous tail leads to a more compact polymer shell around the fluorous nanoparticle. The rate of diffusion of anesthetic molecules in solution is reduced and the emulsion is stabilized.