FIGURE 1.
(A) TEM image showing the size and morphology of IR820-PLGA NPs. (B) The heating profile of IR820-PLGA NPs and free IR820 dye upon laser irradiation (n = 3). (C) The absorption profile of free IR820 and IR820-PLGA NPs before and after storage in water at 4 °C for 30 days as determined by UV–vis spectrophotometry. The concentration of IR820 is 25 μM for both free and encapsulated dye. (D) The hydrodynamic diameter and polydispersity index of IR820-PLGA NPs as determined by DLS when stored in water at 4 °C for 30 days (n = 3).