Figure 2.
SEM micrographs of cross sections of films. (a) Control; (b) 1% TiO2-N; (c) 3% TiO2-N; (d) 5% TiO2-N; (e) 7% TiO2-N; (f) 3% CO-3% TiO2-N; (g) 6% CO-3% TiO2-N; (h) 9% CO-3% TiO2-N; and (i) 12% CO-3% TiO2-N.
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