Nanostructured Multilayer Composite Films of Manganese Dioxide/Nickel/Copper Sulfide Deposited on Polyethylene Terephthalate Supporting Substrate

Figure 5

SEM micrographs of CuS/PET substrates: (a) without heating and (b) heat treated at 150°C, and Ni/CuS/PET substrate after heat treatment at different temperatures: (c) 50°C and (d) 200°C.

(a)

(b)

(c)

(d)