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SEM images at 1000× magnification. (b–f) illustrate the presence of the PPHA on Ti6Al4V alloy surface. (a) Deposition time 0 s; (b) deposition time 30 s; (c) deposition time 45 s; (d) deposition time 60 s; (e) deposition time 90 s; (f) deposition time 120 s.
