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Thin 30/70% Ch/HAp biocomposite layers: (a) 150 µm × 150 µm area topography image, (b) 3-D topography confocal image of non-treated surface; (c) SEM image of non-treated surface; (d) laser irradiated surface with N = 1, I = 7.9 × 1015 W/cm2.
