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Morphology of the films: F1 (CS: PVA:ox-CNO 30.00:70.00:0) (A) at 250×, (B) at 1000×; F2 (CS:PVA:ox-CNO 29.50:70.00:0.50) (C) at 250×, (D) at 1000×; F3 (CS:PVA:ox-CNO 29.00:70.00:1.00) (E) at 250×, (F) at 1000×; F4 (CS:PVA:CS-g-CNO 29.50:70.00:0.50) (G) at 250×, (H) at 1000×; F5 (CS:PVA:CS-g-CNO 29.00:70.00:1.00) (I) at 250×, and (J) at 1000×.
