**1. Introduction**

Glass materials in windows tend to act as good media for the growth and multiplication of microorganisms. The chemical constituents that are absorbed and deposited on glass windows provide nutrition to microorganisms; and thereby promote their growth [1]. The growth of microorganisms on the glass materials causes innumerable problems such as stains [2] and unacceptable odor [3] which is detrimental to human health [4]. It is therefore important to develop glass or glass coating materials with antimicrobial properties to protect the health of the populace.

On the other hand, it is known that ultraviolet radiation in the wavelength range of 280 to 320 nm, which is referred to as UVB, is harmful to the human skin. It causes sunburn, stains, or even skin cancer [5]. UVA, of wavelength range of 320–400 nm is harmful as well, causing skin aging and wrinkling (photoaging). It also causes photocarcinogenesis due to its ability to penetrate the dermal layers, unlike UVB which is absorbed by the epidermis [6]. The science and technology of protecting people against the harmful effects of UV radiation had received increasing interests most especially to countries with tropical climate wherein incidences of heat wave occurs [7]. Tinted glass windows are commonly used in buildings and vehicles to protect people from UV rays. However, the use of tints which are too dark is prohibited by law enforcement agencies since the use of such tints have been increasingly used in criminal activities [8–11]. It is therefore important to develop glass that is not tinted but is able to allow enough visible light to pass through. In this study, tin oxide-silver (SnO2-Ag) composite nanomaterials were fabricated. Toxicity of the nanomaterials to *E*. *coli*  bacteria was tested. The nanomaterials were mixed with laminating fluid. The mixtures were then coated on glass slides and allowed to dry. The ability of the coated glass slides to block UVA was monitored.
