Figure 3

Surface morphology. The SEM images of: (a) and (c) MLCO; (b) and (d) PLCO; (e) MLCO after 60 cycles; and (f) PLCO after 60 cycles.
Surface morphology. The SEM images of: (a) and (c) MLCO; (b) and (d) PLCO; (e) MLCO after 60 cycles; and (f) PLCO after 60 cycles.