Transparent Nanocrystallite Silver for Antibacterial Coating

Table 2

The antibacterial tests against Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus aureus on glass slides that were coated only with sol gel, without any Ag nanoparticles.

Bacteria species	Sample	Number of viable cells of bacteria at 0 hr	Number of viable cells of bacteria after 24 hrs	Value of antimicrobial activity
Pseudomonas aeruginosa	Sol-gel-coated slide∗	2.0×10^5	3.6×10^7	—
	Control∗∗	1.9×10^5	9.5×10^6	—
Escherichia coli	Sol-gel-coated slide	4.6×10^5	1.1×10^8	—
	Control	4.0×10^5	1.7×10^8	—
Staphylococcus aureus	Sol-gel-coated slide	2.0×10^5	1.5×10^7	—
	Control	2.0×10^5	1.5×10^7	—

∗Sol-gel-coated slide: coating consists only sol gel; no Ag silver.
∗∗Control: glass slides with no coating applied.