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Figure 2: Scanning Electron Microscopy (SEM) images. (A) Laser lok (LL) control at day 7 (B) at day 14. (C) LL surface coated with 80 DDA at day 7 (D) at day 14. (E) LL surface coated with 95 DDA at day 7. (F) At day 14. 2500 × magnification.