**Gil Nonato C. Santos, Eduardo B. Tibayan, Gwen B. Castillon, Elmer Estacio, Takashi Furuya, Atsushi Iwamae, Kohji Yamamoto and Masahiko Tani**

**Abstract:** SnO2-Ag composite nanomaterials of mass ratio 1:4, 2:3, 3:2 and 4:1 were fabricated and tested for toxicity to *E*. *coli* using the pour-plate technique. The said nanomaterials were mixed with laminating fluid and then coated on glass slides. The intensity of UVA transmitted through the coated glass slides was measured. Results revealed that the 1:4 ratios of SnO2-Ag composite nanomaterials have the optimum toxicity to *E*. *coli*. Furthermore, the glass slides coated with SnO2 nanomaterial showed the lowest intensity of transmitted UVA.

Reprinted from *Coatings*. Cite as: Santos, G.N.C.; Tibayan, E.B.; Castillon, G.B.; Estacio, E.; Furuya, T.; Iwamae, A.; Yamamoto, K.; Tani, M. Tin Oxide-Silver Composite Nanomaterial Coating for UV Protection and Its Bactericidal Effect on *Escherichia coli* (*E*. *coli*). *Coatings* **2014**, *4*, 320-328.
