FIGURE 2.

AFM topography images showing the phase transition in fully hydrated DPPC bilayer during cooling back from 60°C to room temperature. Bilayer was formed from water solution by applying 30 μL of 0.5 mg/mL onto freshly cleaved pure mica for 5 min, then the cell was rinsed and covered with nanopure water. (a) Cooling back to 50°C; (b) to 36°C; (c) to 30°C; and (d) to 22°C.