Figure 7: The simplified schematics of three states of temperature-sensitive phase-reversible hydrogels including sol, gel (transparent and opaque), and precipitate. Schematically, a circle represents a core-corona micelle. (A) Sol as a fluid colloidal suspension included sparse micelles at the room temperature, (B) Transparent gel as a result of an increase in concentration of polysorbates and compactness of the micelles and consequently mesh like micelles network formation, (C) At high concentrations of polysorbates, because of coarsening and increasing the size of micelles network longer than wavelength of visible light, the gel becomes opaque, (D) A macroscopic precipitate state resulted from breaking and destroying the micelless.