E. coli Bacteriostatic Action Using TiO₂ Photocatalytic Reactions

Table 2

Physical properties of the SG-TiO₂ and SP-TiO₂ photocatalytic thin films.

Physical properties	Thin films
	SG-TiO2	SP-TiO2
Crystalline phase	Anatase	Anatase
Bandgap energy (eV)	3.19	3.22
Contact angle (°)	46.78	57.31
Measured by Gwyddion analysis
Grain size (nm)	35–90	25–80
RMS average roughness (nm)	1.75	0.88
Apparent surface area (m^2·m^−2) ➊	1.02	1.01
Total weight of TiO2 on substrate (g·m^−2) ➋	0.45	0.38
Total apparent surface area per total weight of TiO2 (m^2·g^−1) ➌ = ➊/➋	2.27	2.53
Adhesion
Rank	Good
Classification	4B
Corrosion test	No visible damage