Optical microscope images (A), (A1), (A2) and (A3) of the unfilled PDMS; (B), (B1), (B2) and (B3) of the 0.01% nanofillers in the PDMS/TiO2 nanocomposites; (C), (C1), (C2) and (C3) of the 0.05% nanofillers in the PDMS/TiO2 nanocomposites; (D), (D1), (D2) and (D3) of the 0.1% nanofillers in the PDMS/TiO2 nanocomposites; (E), (E1), (E2) and (E3) of the 0.5% nanofillers in the PDMS/TiO2 nanocomposites; (F), (F1), (F2) and (F2) of the 1% nanofillers in the PDMS/TiO2 nanocomposites; (G), (G1), (G2) and (G3) of the 3% nanofillers in the PDMS/TiO2 nanocomposites; (H), (H1) (H2) and (H3) of the 5% nanofillers in the PDMS/TiO2 nanocomposites; all before and after immersion in bacterial strains for 1 month.