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FEG-SEM images of the coatings in the different areas of the CBD at different magnifications (5000×, 20,000×, 50,000×): (a–c) (+)Cu, (d–f) (++)Cu, (g–i) (+++)Cu. In the Figures at higher magnifications (50,000×, (c,f,i)), the presence of homogeneous nanosized aggregates is clearly visible.
