Figure 2: A photograph of an IMN-liposome gel that is composed of calcein encapsulated DPPC/hmC liposome gel (DPPC 10mg/mL, Calcein 25mM, hmC 10mg/mL) and IMNs (Fe amount 0, 20, 50, 100, 200, 400 μg/mL from left to right),demonstrating calcein release into the PBS solution and a clear boundary between the PBS solution and the gel below that still maintains the integrity of a liposome gel in the PBS. The color of IMN-liposome gel becomes darker as the IMN concentration increases.